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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
6fb914d7 | 2 | /* |
dfbc6fa3 AT |
3 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. |
4 | * http://www.samsung.com | |
5b7d70c6 BD |
5 | * |
6 | * Copyright 2008 Openmoko, Inc. | |
7 | * Copyright 2008 Simtec Electronics | |
8 | * Ben Dooks <ben@simtec.co.uk> | |
9 | * http://armlinux.simtec.co.uk/ | |
10 | * | |
11 | * S3C USB2.0 High-speed / OtG driver | |
8b9bc460 | 12 | */ |
5b7d70c6 BD |
13 | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/spinlock.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/platform_device.h> | |
19 | #include <linux/dma-mapping.h> | |
7ad8096e | 20 | #include <linux/mutex.h> |
5b7d70c6 BD |
21 | #include <linux/seq_file.h> |
22 | #include <linux/delay.h> | |
23 | #include <linux/io.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
c50f056c | 25 | #include <linux/of_platform.h> |
5b7d70c6 BD |
26 | |
27 | #include <linux/usb/ch9.h> | |
28 | #include <linux/usb/gadget.h> | |
b2e587db | 29 | #include <linux/usb/phy.h> |
b4c53b4a MH |
30 | #include <linux/usb/composite.h> |
31 | ||
5b7d70c6 | 32 | |
f7c0b143 | 33 | #include "core.h" |
941fcce4 | 34 | #include "hw.h" |
5b7d70c6 BD |
35 | |
36 | /* conversion functions */ | |
1f91b4cc | 37 | static inline struct dwc2_hsotg_req *our_req(struct usb_request *req) |
5b7d70c6 | 38 | { |
1f91b4cc | 39 | return container_of(req, struct dwc2_hsotg_req, req); |
5b7d70c6 BD |
40 | } |
41 | ||
1f91b4cc | 42 | static inline struct dwc2_hsotg_ep *our_ep(struct usb_ep *ep) |
5b7d70c6 | 43 | { |
1f91b4cc | 44 | return container_of(ep, struct dwc2_hsotg_ep, ep); |
5b7d70c6 BD |
45 | } |
46 | ||
941fcce4 | 47 | static inline struct dwc2_hsotg *to_hsotg(struct usb_gadget *gadget) |
5b7d70c6 | 48 | { |
941fcce4 | 49 | return container_of(gadget, struct dwc2_hsotg, gadget); |
5b7d70c6 BD |
50 | } |
51 | ||
f25c42b8 | 52 | static inline void dwc2_set_bit(struct dwc2_hsotg *hsotg, u32 offset, u32 val) |
5b7d70c6 | 53 | { |
f25c42b8 | 54 | dwc2_writel(hsotg, dwc2_readl(hsotg, offset) | val, offset); |
5b7d70c6 BD |
55 | } |
56 | ||
f25c42b8 | 57 | static inline void dwc2_clear_bit(struct dwc2_hsotg *hsotg, u32 offset, u32 val) |
5b7d70c6 | 58 | { |
f25c42b8 | 59 | dwc2_writel(hsotg, dwc2_readl(hsotg, offset) & ~val, offset); |
5b7d70c6 BD |
60 | } |
61 | ||
1f91b4cc | 62 | static inline struct dwc2_hsotg_ep *index_to_ep(struct dwc2_hsotg *hsotg, |
c6f5c050 MYK |
63 | u32 ep_index, u32 dir_in) |
64 | { | |
65 | if (dir_in) | |
66 | return hsotg->eps_in[ep_index]; | |
67 | else | |
68 | return hsotg->eps_out[ep_index]; | |
69 | } | |
70 | ||
997f4f81 | 71 | /* forward declaration of functions */ |
1f91b4cc | 72 | static void dwc2_hsotg_dump(struct dwc2_hsotg *hsotg); |
5b7d70c6 BD |
73 | |
74 | /** | |
75 | * using_dma - return the DMA status of the driver. | |
76 | * @hsotg: The driver state. | |
77 | * | |
78 | * Return true if we're using DMA. | |
79 | * | |
80 | * Currently, we have the DMA support code worked into everywhere | |
81 | * that needs it, but the AMBA DMA implementation in the hardware can | |
82 | * only DMA from 32bit aligned addresses. This means that gadgets such | |
83 | * as the CDC Ethernet cannot work as they often pass packets which are | |
84 | * not 32bit aligned. | |
85 | * | |
86 | * Unfortunately the choice to use DMA or not is global to the controller | |
87 | * and seems to be only settable when the controller is being put through | |
88 | * a core reset. This means we either need to fix the gadgets to take | |
89 | * account of DMA alignment, or add bounce buffers (yuerk). | |
90 | * | |
edd74be8 | 91 | * g_using_dma is set depending on dts flag. |
5b7d70c6 | 92 | */ |
941fcce4 | 93 | static inline bool using_dma(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 94 | { |
05ee799f | 95 | return hsotg->params.g_dma; |
5b7d70c6 BD |
96 | } |
97 | ||
dec4b556 VA |
98 | /* |
99 | * using_desc_dma - return the descriptor DMA status of the driver. | |
100 | * @hsotg: The driver state. | |
101 | * | |
102 | * Return true if we're using descriptor DMA. | |
103 | */ | |
104 | static inline bool using_desc_dma(struct dwc2_hsotg *hsotg) | |
105 | { | |
106 | return hsotg->params.g_dma_desc; | |
107 | } | |
108 | ||
92d1635d VM |
109 | /** |
110 | * dwc2_gadget_incr_frame_num - Increments the targeted frame number. | |
111 | * @hs_ep: The endpoint | |
92d1635d VM |
112 | * |
113 | * This function will also check if the frame number overruns DSTS_SOFFN_LIMIT. | |
114 | * If an overrun occurs it will wrap the value and set the frame_overrun flag. | |
115 | */ | |
116 | static inline void dwc2_gadget_incr_frame_num(struct dwc2_hsotg_ep *hs_ep) | |
117 | { | |
118 | hs_ep->target_frame += hs_ep->interval; | |
119 | if (hs_ep->target_frame > DSTS_SOFFN_LIMIT) { | |
c1d5df69 | 120 | hs_ep->frame_overrun = true; |
92d1635d VM |
121 | hs_ep->target_frame &= DSTS_SOFFN_LIMIT; |
122 | } else { | |
c1d5df69 | 123 | hs_ep->frame_overrun = false; |
92d1635d VM |
124 | } |
125 | } | |
126 | ||
9d630b9c GT |
127 | /** |
128 | * dwc2_gadget_dec_frame_num_by_one - Decrements the targeted frame number | |
129 | * by one. | |
130 | * @hs_ep: The endpoint. | |
131 | * | |
132 | * This function used in service interval based scheduling flow to calculate | |
133 | * descriptor frame number filed value. For service interval mode frame | |
134 | * number in descriptor should point to last (u)frame in the interval. | |
135 | * | |
136 | */ | |
137 | static inline void dwc2_gadget_dec_frame_num_by_one(struct dwc2_hsotg_ep *hs_ep) | |
138 | { | |
139 | if (hs_ep->target_frame) | |
140 | hs_ep->target_frame -= 1; | |
141 | else | |
142 | hs_ep->target_frame = DSTS_SOFFN_LIMIT; | |
143 | } | |
144 | ||
5b7d70c6 | 145 | /** |
1f91b4cc | 146 | * dwc2_hsotg_en_gsint - enable one or more of the general interrupt |
5b7d70c6 BD |
147 | * @hsotg: The device state |
148 | * @ints: A bitmask of the interrupts to enable | |
149 | */ | |
1f91b4cc | 150 | static void dwc2_hsotg_en_gsint(struct dwc2_hsotg *hsotg, u32 ints) |
5b7d70c6 | 151 | { |
f25c42b8 | 152 | u32 gsintmsk = dwc2_readl(hsotg, GINTMSK); |
5b7d70c6 BD |
153 | u32 new_gsintmsk; |
154 | ||
155 | new_gsintmsk = gsintmsk | ints; | |
156 | ||
157 | if (new_gsintmsk != gsintmsk) { | |
158 | dev_dbg(hsotg->dev, "gsintmsk now 0x%08x\n", new_gsintmsk); | |
f25c42b8 | 159 | dwc2_writel(hsotg, new_gsintmsk, GINTMSK); |
5b7d70c6 BD |
160 | } |
161 | } | |
162 | ||
163 | /** | |
1f91b4cc | 164 | * dwc2_hsotg_disable_gsint - disable one or more of the general interrupt |
5b7d70c6 BD |
165 | * @hsotg: The device state |
166 | * @ints: A bitmask of the interrupts to enable | |
167 | */ | |
1f91b4cc | 168 | static void dwc2_hsotg_disable_gsint(struct dwc2_hsotg *hsotg, u32 ints) |
5b7d70c6 | 169 | { |
f25c42b8 | 170 | u32 gsintmsk = dwc2_readl(hsotg, GINTMSK); |
5b7d70c6 BD |
171 | u32 new_gsintmsk; |
172 | ||
173 | new_gsintmsk = gsintmsk & ~ints; | |
174 | ||
175 | if (new_gsintmsk != gsintmsk) | |
f25c42b8 | 176 | dwc2_writel(hsotg, new_gsintmsk, GINTMSK); |
5b7d70c6 BD |
177 | } |
178 | ||
179 | /** | |
1f91b4cc | 180 | * dwc2_hsotg_ctrl_epint - enable/disable an endpoint irq |
5b7d70c6 BD |
181 | * @hsotg: The device state |
182 | * @ep: The endpoint index | |
183 | * @dir_in: True if direction is in. | |
184 | * @en: The enable value, true to enable | |
185 | * | |
186 | * Set or clear the mask for an individual endpoint's interrupt | |
187 | * request. | |
188 | */ | |
1f91b4cc | 189 | static void dwc2_hsotg_ctrl_epint(struct dwc2_hsotg *hsotg, |
9da51974 | 190 | unsigned int ep, unsigned int dir_in, |
5b7d70c6 BD |
191 | unsigned int en) |
192 | { | |
193 | unsigned long flags; | |
194 | u32 bit = 1 << ep; | |
195 | u32 daint; | |
196 | ||
197 | if (!dir_in) | |
198 | bit <<= 16; | |
199 | ||
200 | local_irq_save(flags); | |
f25c42b8 | 201 | daint = dwc2_readl(hsotg, DAINTMSK); |
5b7d70c6 BD |
202 | if (en) |
203 | daint |= bit; | |
204 | else | |
205 | daint &= ~bit; | |
f25c42b8 | 206 | dwc2_writel(hsotg, daint, DAINTMSK); |
5b7d70c6 BD |
207 | local_irq_restore(flags); |
208 | } | |
209 | ||
c138ecfa SA |
210 | /** |
211 | * dwc2_hsotg_tx_fifo_count - return count of TX FIFOs in device mode | |
6fb914d7 GT |
212 | * |
213 | * @hsotg: Programming view of the DWC_otg controller | |
c138ecfa SA |
214 | */ |
215 | int dwc2_hsotg_tx_fifo_count(struct dwc2_hsotg *hsotg) | |
216 | { | |
217 | if (hsotg->hw_params.en_multiple_tx_fifo) | |
218 | /* In dedicated FIFO mode we need count of IN EPs */ | |
9273083a | 219 | return hsotg->hw_params.num_dev_in_eps; |
c138ecfa SA |
220 | else |
221 | /* In shared FIFO mode we need count of Periodic IN EPs */ | |
222 | return hsotg->hw_params.num_dev_perio_in_ep; | |
223 | } | |
224 | ||
c138ecfa SA |
225 | /** |
226 | * dwc2_hsotg_tx_fifo_total_depth - return total FIFO depth available for | |
227 | * device mode TX FIFOs | |
6fb914d7 GT |
228 | * |
229 | * @hsotg: Programming view of the DWC_otg controller | |
c138ecfa SA |
230 | */ |
231 | int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg) | |
232 | { | |
c138ecfa SA |
233 | int addr; |
234 | int tx_addr_max; | |
235 | u32 np_tx_fifo_size; | |
236 | ||
237 | np_tx_fifo_size = min_t(u32, hsotg->hw_params.dev_nperio_tx_fifo_size, | |
238 | hsotg->params.g_np_tx_fifo_size); | |
239 | ||
240 | /* Get Endpoint Info Control block size in DWORDs. */ | |
9273083a | 241 | tx_addr_max = hsotg->hw_params.total_fifo_size; |
c138ecfa SA |
242 | |
243 | addr = hsotg->params.g_rx_fifo_size + np_tx_fifo_size; | |
244 | if (tx_addr_max <= addr) | |
245 | return 0; | |
246 | ||
247 | return tx_addr_max - addr; | |
248 | } | |
249 | ||
187c5298 GT |
250 | /** |
251 | * dwc2_gadget_wkup_alert_handler - Handler for WKUP_ALERT interrupt | |
252 | * | |
253 | * @hsotg: Programming view of the DWC_otg controller | |
254 | * | |
255 | */ | |
256 | static void dwc2_gadget_wkup_alert_handler(struct dwc2_hsotg *hsotg) | |
257 | { | |
258 | u32 gintsts2; | |
259 | u32 gintmsk2; | |
260 | ||
261 | gintsts2 = dwc2_readl(hsotg, GINTSTS2); | |
262 | gintmsk2 = dwc2_readl(hsotg, GINTMSK2); | |
263 | ||
264 | if (gintsts2 & GINTSTS2_WKUP_ALERT_INT) { | |
265 | dev_dbg(hsotg->dev, "%s: Wkup_Alert_Int\n", __func__); | |
87b6d2c5 | 266 | dwc2_set_bit(hsotg, GINTSTS2, GINTSTS2_WKUP_ALERT_INT); |
d64bc8ee | 267 | dwc2_set_bit(hsotg, DCTL, DCTL_RMTWKUPSIG); |
187c5298 GT |
268 | } |
269 | } | |
270 | ||
c138ecfa SA |
271 | /** |
272 | * dwc2_hsotg_tx_fifo_average_depth - returns average depth of device mode | |
273 | * TX FIFOs | |
6fb914d7 GT |
274 | * |
275 | * @hsotg: Programming view of the DWC_otg controller | |
c138ecfa SA |
276 | */ |
277 | int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg) | |
278 | { | |
279 | int tx_fifo_count; | |
280 | int tx_fifo_depth; | |
281 | ||
282 | tx_fifo_depth = dwc2_hsotg_tx_fifo_total_depth(hsotg); | |
283 | ||
284 | tx_fifo_count = dwc2_hsotg_tx_fifo_count(hsotg); | |
285 | ||
286 | if (!tx_fifo_count) | |
287 | return tx_fifo_depth; | |
288 | else | |
289 | return tx_fifo_depth / tx_fifo_count; | |
290 | } | |
291 | ||
5b7d70c6 | 292 | /** |
1f91b4cc | 293 | * dwc2_hsotg_init_fifo - initialise non-periodic FIFOs |
5b7d70c6 BD |
294 | * @hsotg: The device instance. |
295 | */ | |
1f91b4cc | 296 | static void dwc2_hsotg_init_fifo(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 297 | { |
2317eacd | 298 | unsigned int ep; |
0f002d20 | 299 | unsigned int addr; |
1703a6d3 | 300 | int timeout; |
79d6b8c5 | 301 | |
0f002d20 | 302 | u32 val; |
05ee799f | 303 | u32 *txfsz = hsotg->params.g_tx_fifo_size; |
0f002d20 | 304 | |
7fcbc95c GH |
305 | /* Reset fifo map if not correctly cleared during previous session */ |
306 | WARN_ON(hsotg->fifo_map); | |
307 | hsotg->fifo_map = 0; | |
308 | ||
0a176279 | 309 | /* set RX/NPTX FIFO sizes */ |
f25c42b8 GS |
310 | dwc2_writel(hsotg, hsotg->params.g_rx_fifo_size, GRXFSIZ); |
311 | dwc2_writel(hsotg, (hsotg->params.g_rx_fifo_size << | |
312 | FIFOSIZE_STARTADDR_SHIFT) | | |
05ee799f | 313 | (hsotg->params.g_np_tx_fifo_size << FIFOSIZE_DEPTH_SHIFT), |
f25c42b8 | 314 | GNPTXFSIZ); |
0f002d20 | 315 | |
8b9bc460 LM |
316 | /* |
317 | * arange all the rest of the TX FIFOs, as some versions of this | |
0f002d20 BD |
318 | * block have overlapping default addresses. This also ensures |
319 | * that if the settings have been changed, then they are set to | |
8b9bc460 LM |
320 | * known values. |
321 | */ | |
0f002d20 BD |
322 | |
323 | /* start at the end of the GNPTXFSIZ, rounded up */ | |
05ee799f | 324 | addr = hsotg->params.g_rx_fifo_size + hsotg->params.g_np_tx_fifo_size; |
0f002d20 | 325 | |
8b9bc460 | 326 | /* |
0a176279 | 327 | * Configure fifos sizes from provided configuration and assign |
b203d0a2 RB |
328 | * them to endpoints dynamically according to maxpacket size value of |
329 | * given endpoint. | |
8b9bc460 | 330 | */ |
2317eacd | 331 | for (ep = 1; ep < MAX_EPS_CHANNELS; ep++) { |
05ee799f | 332 | if (!txfsz[ep]) |
3fa95385 JY |
333 | continue; |
334 | val = addr; | |
05ee799f JY |
335 | val |= txfsz[ep] << FIFOSIZE_DEPTH_SHIFT; |
336 | WARN_ONCE(addr + txfsz[ep] > hsotg->fifo_mem, | |
3fa95385 | 337 | "insufficient fifo memory"); |
05ee799f | 338 | addr += txfsz[ep]; |
0f002d20 | 339 | |
f25c42b8 GS |
340 | dwc2_writel(hsotg, val, DPTXFSIZN(ep)); |
341 | val = dwc2_readl(hsotg, DPTXFSIZN(ep)); | |
0f002d20 | 342 | } |
1703a6d3 | 343 | |
f25c42b8 | 344 | dwc2_writel(hsotg, hsotg->hw_params.total_fifo_size | |
f87c842f | 345 | addr << GDFIFOCFG_EPINFOBASE_SHIFT, |
f25c42b8 | 346 | GDFIFOCFG); |
8b9bc460 LM |
347 | /* |
348 | * according to p428 of the design guide, we need to ensure that | |
349 | * all fifos are flushed before continuing | |
350 | */ | |
1703a6d3 | 351 | |
f25c42b8 GS |
352 | dwc2_writel(hsotg, GRSTCTL_TXFNUM(0x10) | GRSTCTL_TXFFLSH | |
353 | GRSTCTL_RXFFLSH, GRSTCTL); | |
1703a6d3 BD |
354 | |
355 | /* wait until the fifos are both flushed */ | |
356 | timeout = 100; | |
357 | while (1) { | |
f25c42b8 | 358 | val = dwc2_readl(hsotg, GRSTCTL); |
1703a6d3 | 359 | |
47a1685f | 360 | if ((val & (GRSTCTL_TXFFLSH | GRSTCTL_RXFFLSH)) == 0) |
1703a6d3 BD |
361 | break; |
362 | ||
363 | if (--timeout == 0) { | |
364 | dev_err(hsotg->dev, | |
365 | "%s: timeout flushing fifos (GRSTCTL=%08x)\n", | |
366 | __func__, val); | |
48b20bcb | 367 | break; |
1703a6d3 BD |
368 | } |
369 | ||
370 | udelay(1); | |
371 | } | |
372 | ||
373 | dev_dbg(hsotg->dev, "FIFOs reset, timeout at %d\n", timeout); | |
5b7d70c6 BD |
374 | } |
375 | ||
376 | /** | |
6fb914d7 | 377 | * dwc2_hsotg_ep_alloc_request - allocate USB rerequest structure |
5b7d70c6 BD |
378 | * @ep: USB endpoint to allocate request for. |
379 | * @flags: Allocation flags | |
380 | * | |
381 | * Allocate a new USB request structure appropriate for the specified endpoint | |
382 | */ | |
1f91b4cc | 383 | static struct usb_request *dwc2_hsotg_ep_alloc_request(struct usb_ep *ep, |
9da51974 | 384 | gfp_t flags) |
5b7d70c6 | 385 | { |
1f91b4cc | 386 | struct dwc2_hsotg_req *req; |
5b7d70c6 | 387 | |
ec33efe2 | 388 | req = kzalloc(sizeof(*req), flags); |
5b7d70c6 BD |
389 | if (!req) |
390 | return NULL; | |
391 | ||
392 | INIT_LIST_HEAD(&req->queue); | |
393 | ||
5b7d70c6 BD |
394 | return &req->req; |
395 | } | |
396 | ||
397 | /** | |
398 | * is_ep_periodic - return true if the endpoint is in periodic mode. | |
399 | * @hs_ep: The endpoint to query. | |
400 | * | |
401 | * Returns true if the endpoint is in periodic mode, meaning it is being | |
402 | * used for an Interrupt or ISO transfer. | |
403 | */ | |
1f91b4cc | 404 | static inline int is_ep_periodic(struct dwc2_hsotg_ep *hs_ep) |
5b7d70c6 BD |
405 | { |
406 | return hs_ep->periodic; | |
407 | } | |
408 | ||
409 | /** | |
1f91b4cc | 410 | * dwc2_hsotg_unmap_dma - unmap the DMA memory being used for the request |
5b7d70c6 BD |
411 | * @hsotg: The device state. |
412 | * @hs_ep: The endpoint for the request | |
413 | * @hs_req: The request being processed. | |
414 | * | |
1f91b4cc | 415 | * This is the reverse of dwc2_hsotg_map_dma(), called for the completion |
5b7d70c6 | 416 | * of a request to ensure the buffer is ready for access by the caller. |
8b9bc460 | 417 | */ |
1f91b4cc | 418 | static void dwc2_hsotg_unmap_dma(struct dwc2_hsotg *hsotg, |
9da51974 | 419 | struct dwc2_hsotg_ep *hs_ep, |
1f91b4cc | 420 | struct dwc2_hsotg_req *hs_req) |
5b7d70c6 BD |
421 | { |
422 | struct usb_request *req = &hs_req->req; | |
9da51974 | 423 | |
17d966a3 | 424 | usb_gadget_unmap_request(&hsotg->gadget, req, hs_ep->dir_in); |
5b7d70c6 BD |
425 | } |
426 | ||
0f6b80c0 VA |
427 | /* |
428 | * dwc2_gadget_alloc_ctrl_desc_chains - allocate DMA descriptor chains | |
429 | * for Control endpoint | |
430 | * @hsotg: The device state. | |
431 | * | |
432 | * This function will allocate 4 descriptor chains for EP 0: 2 for | |
433 | * Setup stage, per one for IN and OUT data/status transactions. | |
434 | */ | |
435 | static int dwc2_gadget_alloc_ctrl_desc_chains(struct dwc2_hsotg *hsotg) | |
436 | { | |
437 | hsotg->setup_desc[0] = | |
438 | dmam_alloc_coherent(hsotg->dev, | |
439 | sizeof(struct dwc2_dma_desc), | |
440 | &hsotg->setup_desc_dma[0], | |
441 | GFP_KERNEL); | |
442 | if (!hsotg->setup_desc[0]) | |
443 | goto fail; | |
444 | ||
445 | hsotg->setup_desc[1] = | |
446 | dmam_alloc_coherent(hsotg->dev, | |
447 | sizeof(struct dwc2_dma_desc), | |
448 | &hsotg->setup_desc_dma[1], | |
449 | GFP_KERNEL); | |
450 | if (!hsotg->setup_desc[1]) | |
451 | goto fail; | |
452 | ||
453 | hsotg->ctrl_in_desc = | |
454 | dmam_alloc_coherent(hsotg->dev, | |
455 | sizeof(struct dwc2_dma_desc), | |
456 | &hsotg->ctrl_in_desc_dma, | |
457 | GFP_KERNEL); | |
458 | if (!hsotg->ctrl_in_desc) | |
459 | goto fail; | |
460 | ||
461 | hsotg->ctrl_out_desc = | |
462 | dmam_alloc_coherent(hsotg->dev, | |
463 | sizeof(struct dwc2_dma_desc), | |
464 | &hsotg->ctrl_out_desc_dma, | |
465 | GFP_KERNEL); | |
466 | if (!hsotg->ctrl_out_desc) | |
467 | goto fail; | |
468 | ||
469 | return 0; | |
470 | ||
471 | fail: | |
472 | return -ENOMEM; | |
473 | } | |
474 | ||
5b7d70c6 | 475 | /** |
1f91b4cc | 476 | * dwc2_hsotg_write_fifo - write packet Data to the TxFIFO |
5b7d70c6 BD |
477 | * @hsotg: The controller state. |
478 | * @hs_ep: The endpoint we're going to write for. | |
479 | * @hs_req: The request to write data for. | |
480 | * | |
481 | * This is called when the TxFIFO has some space in it to hold a new | |
482 | * transmission and we have something to give it. The actual setup of | |
483 | * the data size is done elsewhere, so all we have to do is to actually | |
484 | * write the data. | |
485 | * | |
486 | * The return value is zero if there is more space (or nothing was done) | |
487 | * otherwise -ENOSPC is returned if the FIFO space was used up. | |
488 | * | |
489 | * This routine is only needed for PIO | |
8b9bc460 | 490 | */ |
1f91b4cc | 491 | static int dwc2_hsotg_write_fifo(struct dwc2_hsotg *hsotg, |
9da51974 | 492 | struct dwc2_hsotg_ep *hs_ep, |
1f91b4cc | 493 | struct dwc2_hsotg_req *hs_req) |
5b7d70c6 BD |
494 | { |
495 | bool periodic = is_ep_periodic(hs_ep); | |
f25c42b8 | 496 | u32 gnptxsts = dwc2_readl(hsotg, GNPTXSTS); |
5b7d70c6 BD |
497 | int buf_pos = hs_req->req.actual; |
498 | int to_write = hs_ep->size_loaded; | |
499 | void *data; | |
500 | int can_write; | |
501 | int pkt_round; | |
4fca54aa | 502 | int max_transfer; |
5b7d70c6 BD |
503 | |
504 | to_write -= (buf_pos - hs_ep->last_load); | |
505 | ||
506 | /* if there's nothing to write, get out early */ | |
507 | if (to_write == 0) | |
508 | return 0; | |
509 | ||
10aebc77 | 510 | if (periodic && !hsotg->dedicated_fifos) { |
f25c42b8 | 511 | u32 epsize = dwc2_readl(hsotg, DIEPTSIZ(hs_ep->index)); |
5b7d70c6 BD |
512 | int size_left; |
513 | int size_done; | |
514 | ||
8b9bc460 LM |
515 | /* |
516 | * work out how much data was loaded so we can calculate | |
517 | * how much data is left in the fifo. | |
518 | */ | |
5b7d70c6 | 519 | |
47a1685f | 520 | size_left = DXEPTSIZ_XFERSIZE_GET(epsize); |
5b7d70c6 | 521 | |
8b9bc460 LM |
522 | /* |
523 | * if shared fifo, we cannot write anything until the | |
e7a9ff54 BD |
524 | * previous data has been completely sent. |
525 | */ | |
526 | if (hs_ep->fifo_load != 0) { | |
1f91b4cc | 527 | dwc2_hsotg_en_gsint(hsotg, GINTSTS_PTXFEMP); |
e7a9ff54 BD |
528 | return -ENOSPC; |
529 | } | |
530 | ||
5b7d70c6 BD |
531 | dev_dbg(hsotg->dev, "%s: left=%d, load=%d, fifo=%d, size %d\n", |
532 | __func__, size_left, | |
533 | hs_ep->size_loaded, hs_ep->fifo_load, hs_ep->fifo_size); | |
534 | ||
535 | /* how much of the data has moved */ | |
536 | size_done = hs_ep->size_loaded - size_left; | |
537 | ||
538 | /* how much data is left in the fifo */ | |
539 | can_write = hs_ep->fifo_load - size_done; | |
540 | dev_dbg(hsotg->dev, "%s: => can_write1=%d\n", | |
541 | __func__, can_write); | |
542 | ||
543 | can_write = hs_ep->fifo_size - can_write; | |
544 | dev_dbg(hsotg->dev, "%s: => can_write2=%d\n", | |
545 | __func__, can_write); | |
546 | ||
547 | if (can_write <= 0) { | |
1f91b4cc | 548 | dwc2_hsotg_en_gsint(hsotg, GINTSTS_PTXFEMP); |
5b7d70c6 BD |
549 | return -ENOSPC; |
550 | } | |
10aebc77 | 551 | } else if (hsotg->dedicated_fifos && hs_ep->index != 0) { |
f25c42b8 GS |
552 | can_write = dwc2_readl(hsotg, |
553 | DTXFSTS(hs_ep->fifo_index)); | |
10aebc77 BD |
554 | |
555 | can_write &= 0xffff; | |
556 | can_write *= 4; | |
5b7d70c6 | 557 | } else { |
47a1685f | 558 | if (GNPTXSTS_NP_TXQ_SPC_AVAIL_GET(gnptxsts) == 0) { |
5b7d70c6 BD |
559 | dev_dbg(hsotg->dev, |
560 | "%s: no queue slots available (0x%08x)\n", | |
561 | __func__, gnptxsts); | |
562 | ||
1f91b4cc | 563 | dwc2_hsotg_en_gsint(hsotg, GINTSTS_NPTXFEMP); |
5b7d70c6 BD |
564 | return -ENOSPC; |
565 | } | |
566 | ||
47a1685f | 567 | can_write = GNPTXSTS_NP_TXF_SPC_AVAIL_GET(gnptxsts); |
679f9b7c | 568 | can_write *= 4; /* fifo size is in 32bit quantities. */ |
5b7d70c6 BD |
569 | } |
570 | ||
4fca54aa RB |
571 | max_transfer = hs_ep->ep.maxpacket * hs_ep->mc; |
572 | ||
573 | dev_dbg(hsotg->dev, "%s: GNPTXSTS=%08x, can=%d, to=%d, max_transfer %d\n", | |
9da51974 | 574 | __func__, gnptxsts, can_write, to_write, max_transfer); |
5b7d70c6 | 575 | |
8b9bc460 LM |
576 | /* |
577 | * limit to 512 bytes of data, it seems at least on the non-periodic | |
5b7d70c6 BD |
578 | * FIFO, requests of >512 cause the endpoint to get stuck with a |
579 | * fragment of the end of the transfer in it. | |
580 | */ | |
811f3303 | 581 | if (can_write > 512 && !periodic) |
5b7d70c6 BD |
582 | can_write = 512; |
583 | ||
8b9bc460 LM |
584 | /* |
585 | * limit the write to one max-packet size worth of data, but allow | |
03e10e5a | 586 | * the transfer to return that it did not run out of fifo space |
8b9bc460 LM |
587 | * doing it. |
588 | */ | |
4fca54aa RB |
589 | if (to_write > max_transfer) { |
590 | to_write = max_transfer; | |
03e10e5a | 591 | |
5cb2ff0c RB |
592 | /* it's needed only when we do not use dedicated fifos */ |
593 | if (!hsotg->dedicated_fifos) | |
1f91b4cc | 594 | dwc2_hsotg_en_gsint(hsotg, |
9da51974 | 595 | periodic ? GINTSTS_PTXFEMP : |
47a1685f | 596 | GINTSTS_NPTXFEMP); |
03e10e5a BD |
597 | } |
598 | ||
5b7d70c6 BD |
599 | /* see if we can write data */ |
600 | ||
601 | if (to_write > can_write) { | |
602 | to_write = can_write; | |
4fca54aa | 603 | pkt_round = to_write % max_transfer; |
5b7d70c6 | 604 | |
8b9bc460 LM |
605 | /* |
606 | * Round the write down to an | |
5b7d70c6 BD |
607 | * exact number of packets. |
608 | * | |
609 | * Note, we do not currently check to see if we can ever | |
610 | * write a full packet or not to the FIFO. | |
611 | */ | |
612 | ||
613 | if (pkt_round) | |
614 | to_write -= pkt_round; | |
615 | ||
8b9bc460 LM |
616 | /* |
617 | * enable correct FIFO interrupt to alert us when there | |
618 | * is more room left. | |
619 | */ | |
5b7d70c6 | 620 | |
5cb2ff0c RB |
621 | /* it's needed only when we do not use dedicated fifos */ |
622 | if (!hsotg->dedicated_fifos) | |
1f91b4cc | 623 | dwc2_hsotg_en_gsint(hsotg, |
9da51974 | 624 | periodic ? GINTSTS_PTXFEMP : |
47a1685f | 625 | GINTSTS_NPTXFEMP); |
5b7d70c6 BD |
626 | } |
627 | ||
628 | dev_dbg(hsotg->dev, "write %d/%d, can_write %d, done %d\n", | |
9da51974 | 629 | to_write, hs_req->req.length, can_write, buf_pos); |
5b7d70c6 BD |
630 | |
631 | if (to_write <= 0) | |
632 | return -ENOSPC; | |
633 | ||
634 | hs_req->req.actual = buf_pos + to_write; | |
635 | hs_ep->total_data += to_write; | |
636 | ||
637 | if (periodic) | |
638 | hs_ep->fifo_load += to_write; | |
639 | ||
640 | to_write = DIV_ROUND_UP(to_write, 4); | |
641 | data = hs_req->req.buf + buf_pos; | |
642 | ||
342ccce1 | 643 | dwc2_writel_rep(hsotg, EPFIFO(hs_ep->index), data, to_write); |
5b7d70c6 BD |
644 | |
645 | return (to_write >= can_write) ? -ENOSPC : 0; | |
646 | } | |
647 | ||
648 | /** | |
649 | * get_ep_limit - get the maximum data legnth for this endpoint | |
650 | * @hs_ep: The endpoint | |
651 | * | |
652 | * Return the maximum data that can be queued in one go on a given endpoint | |
653 | * so that transfers that are too long can be split. | |
654 | */ | |
9da51974 | 655 | static unsigned int get_ep_limit(struct dwc2_hsotg_ep *hs_ep) |
5b7d70c6 BD |
656 | { |
657 | int index = hs_ep->index; | |
9da51974 JY |
658 | unsigned int maxsize; |
659 | unsigned int maxpkt; | |
5b7d70c6 BD |
660 | |
661 | if (index != 0) { | |
47a1685f DN |
662 | maxsize = DXEPTSIZ_XFERSIZE_LIMIT + 1; |
663 | maxpkt = DXEPTSIZ_PKTCNT_LIMIT + 1; | |
5b7d70c6 | 664 | } else { |
9da51974 | 665 | maxsize = 64 + 64; |
66e5c643 | 666 | if (hs_ep->dir_in) |
47a1685f | 667 | maxpkt = DIEPTSIZ0_PKTCNT_LIMIT + 1; |
66e5c643 | 668 | else |
5b7d70c6 | 669 | maxpkt = 2; |
5b7d70c6 BD |
670 | } |
671 | ||
672 | /* we made the constant loading easier above by using +1 */ | |
673 | maxpkt--; | |
674 | maxsize--; | |
675 | ||
8b9bc460 LM |
676 | /* |
677 | * constrain by packet count if maxpkts*pktsize is greater | |
678 | * than the length register size. | |
679 | */ | |
5b7d70c6 BD |
680 | |
681 | if ((maxpkt * hs_ep->ep.maxpacket) < maxsize) | |
682 | maxsize = maxpkt * hs_ep->ep.maxpacket; | |
683 | ||
684 | return maxsize; | |
685 | } | |
686 | ||
381fc8f8 | 687 | /** |
38beaec6 JY |
688 | * dwc2_hsotg_read_frameno - read current frame number |
689 | * @hsotg: The device instance | |
690 | * | |
691 | * Return the current frame number | |
692 | */ | |
381fc8f8 VM |
693 | static u32 dwc2_hsotg_read_frameno(struct dwc2_hsotg *hsotg) |
694 | { | |
695 | u32 dsts; | |
696 | ||
f25c42b8 | 697 | dsts = dwc2_readl(hsotg, DSTS); |
381fc8f8 VM |
698 | dsts &= DSTS_SOFFN_MASK; |
699 | dsts >>= DSTS_SOFFN_SHIFT; | |
700 | ||
701 | return dsts; | |
702 | } | |
703 | ||
cf77b5fb VA |
704 | /** |
705 | * dwc2_gadget_get_chain_limit - get the maximum data payload value of the | |
706 | * DMA descriptor chain prepared for specific endpoint | |
707 | * @hs_ep: The endpoint | |
708 | * | |
709 | * Return the maximum data that can be queued in one go on a given endpoint | |
710 | * depending on its descriptor chain capacity so that transfers that | |
711 | * are too long can be split. | |
712 | */ | |
713 | static unsigned int dwc2_gadget_get_chain_limit(struct dwc2_hsotg_ep *hs_ep) | |
714 | { | |
715 | int is_isoc = hs_ep->isochronous; | |
716 | unsigned int maxsize; | |
717 | ||
718 | if (is_isoc) | |
54f37f56 MH |
719 | maxsize = (hs_ep->dir_in ? DEV_DMA_ISOC_TX_NBYTES_LIMIT : |
720 | DEV_DMA_ISOC_RX_NBYTES_LIMIT) * | |
721 | MAX_DMA_DESC_NUM_HS_ISOC; | |
cf77b5fb | 722 | else |
54f37f56 | 723 | maxsize = DEV_DMA_NBYTES_LIMIT * MAX_DMA_DESC_NUM_GENERIC; |
cf77b5fb VA |
724 | |
725 | return maxsize; | |
726 | } | |
727 | ||
e02f9aa6 VA |
728 | /* |
729 | * dwc2_gadget_get_desc_params - get DMA descriptor parameters. | |
730 | * @hs_ep: The endpoint | |
731 | * @mask: RX/TX bytes mask to be defined | |
732 | * | |
733 | * Returns maximum data payload for one descriptor after analyzing endpoint | |
734 | * characteristics. | |
735 | * DMA descriptor transfer bytes limit depends on EP type: | |
736 | * Control out - MPS, | |
737 | * Isochronous - descriptor rx/tx bytes bitfield limit, | |
738 | * Control In/Bulk/Interrupt - multiple of mps. This will allow to not | |
739 | * have concatenations from various descriptors within one packet. | |
740 | * | |
741 | * Selects corresponding mask for RX/TX bytes as well. | |
742 | */ | |
743 | static u32 dwc2_gadget_get_desc_params(struct dwc2_hsotg_ep *hs_ep, u32 *mask) | |
744 | { | |
745 | u32 mps = hs_ep->ep.maxpacket; | |
746 | int dir_in = hs_ep->dir_in; | |
747 | u32 desc_size = 0; | |
748 | ||
749 | if (!hs_ep->index && !dir_in) { | |
750 | desc_size = mps; | |
751 | *mask = DEV_DMA_NBYTES_MASK; | |
752 | } else if (hs_ep->isochronous) { | |
753 | if (dir_in) { | |
754 | desc_size = DEV_DMA_ISOC_TX_NBYTES_LIMIT; | |
755 | *mask = DEV_DMA_ISOC_TX_NBYTES_MASK; | |
756 | } else { | |
757 | desc_size = DEV_DMA_ISOC_RX_NBYTES_LIMIT; | |
758 | *mask = DEV_DMA_ISOC_RX_NBYTES_MASK; | |
759 | } | |
760 | } else { | |
761 | desc_size = DEV_DMA_NBYTES_LIMIT; | |
762 | *mask = DEV_DMA_NBYTES_MASK; | |
763 | ||
764 | /* Round down desc_size to be mps multiple */ | |
765 | desc_size -= desc_size % mps; | |
766 | } | |
767 | ||
768 | return desc_size; | |
769 | } | |
770 | ||
10209abe AP |
771 | static void dwc2_gadget_fill_nonisoc_xfer_ddma_one(struct dwc2_hsotg_ep *hs_ep, |
772 | struct dwc2_dma_desc **desc, | |
e02f9aa6 | 773 | dma_addr_t dma_buff, |
10209abe AP |
774 | unsigned int len, |
775 | bool true_last) | |
e02f9aa6 | 776 | { |
e02f9aa6 | 777 | int dir_in = hs_ep->dir_in; |
e02f9aa6 VA |
778 | u32 mps = hs_ep->ep.maxpacket; |
779 | u32 maxsize = 0; | |
780 | u32 offset = 0; | |
781 | u32 mask = 0; | |
782 | int i; | |
783 | ||
784 | maxsize = dwc2_gadget_get_desc_params(hs_ep, &mask); | |
785 | ||
786 | hs_ep->desc_count = (len / maxsize) + | |
787 | ((len % maxsize) ? 1 : 0); | |
788 | if (len == 0) | |
789 | hs_ep->desc_count = 1; | |
790 | ||
791 | for (i = 0; i < hs_ep->desc_count; ++i) { | |
10209abe AP |
792 | (*desc)->status = 0; |
793 | (*desc)->status |= (DEV_DMA_BUFF_STS_HBUSY | |
e02f9aa6 VA |
794 | << DEV_DMA_BUFF_STS_SHIFT); |
795 | ||
796 | if (len > maxsize) { | |
797 | if (!hs_ep->index && !dir_in) | |
10209abe | 798 | (*desc)->status |= (DEV_DMA_L | DEV_DMA_IOC); |
e02f9aa6 | 799 | |
10209abe AP |
800 | (*desc)->status |= |
801 | maxsize << DEV_DMA_NBYTES_SHIFT & mask; | |
802 | (*desc)->buf = dma_buff + offset; | |
e02f9aa6 VA |
803 | |
804 | len -= maxsize; | |
805 | offset += maxsize; | |
806 | } else { | |
10209abe AP |
807 | if (true_last) |
808 | (*desc)->status |= (DEV_DMA_L | DEV_DMA_IOC); | |
e02f9aa6 VA |
809 | |
810 | if (dir_in) | |
10209abe AP |
811 | (*desc)->status |= (len % mps) ? DEV_DMA_SHORT : |
812 | ((hs_ep->send_zlp && true_last) ? | |
813 | DEV_DMA_SHORT : 0); | |
e02f9aa6 | 814 | |
10209abe | 815 | (*desc)->status |= |
e02f9aa6 | 816 | len << DEV_DMA_NBYTES_SHIFT & mask; |
10209abe | 817 | (*desc)->buf = dma_buff + offset; |
e02f9aa6 VA |
818 | } |
819 | ||
10209abe AP |
820 | (*desc)->status &= ~DEV_DMA_BUFF_STS_MASK; |
821 | (*desc)->status |= (DEV_DMA_BUFF_STS_HREADY | |
e02f9aa6 | 822 | << DEV_DMA_BUFF_STS_SHIFT); |
10209abe AP |
823 | (*desc)++; |
824 | } | |
825 | } | |
826 | ||
827 | /* | |
828 | * dwc2_gadget_config_nonisoc_xfer_ddma - prepare non ISOC DMA desc chain. | |
829 | * @hs_ep: The endpoint | |
830 | * @ureq: Request to transfer | |
831 | * @offset: offset in bytes | |
832 | * @len: Length of the transfer | |
833 | * | |
834 | * This function will iterate over descriptor chain and fill its entries | |
835 | * with corresponding information based on transfer data. | |
836 | */ | |
837 | static void dwc2_gadget_config_nonisoc_xfer_ddma(struct dwc2_hsotg_ep *hs_ep, | |
066cfd07 | 838 | dma_addr_t dma_buff, |
10209abe AP |
839 | unsigned int len) |
840 | { | |
066cfd07 | 841 | struct usb_request *ureq = NULL; |
10209abe AP |
842 | struct dwc2_dma_desc *desc = hs_ep->desc_list; |
843 | struct scatterlist *sg; | |
844 | int i; | |
845 | u8 desc_count = 0; | |
846 | ||
066cfd07 AP |
847 | if (hs_ep->req) |
848 | ureq = &hs_ep->req->req; | |
849 | ||
10209abe | 850 | /* non-DMA sg buffer */ |
066cfd07 | 851 | if (!ureq || !ureq->num_sgs) { |
10209abe | 852 | dwc2_gadget_fill_nonisoc_xfer_ddma_one(hs_ep, &desc, |
066cfd07 | 853 | dma_buff, len, true); |
10209abe | 854 | return; |
e02f9aa6 | 855 | } |
10209abe AP |
856 | |
857 | /* DMA sg buffer */ | |
858 | for_each_sg(ureq->sg, sg, ureq->num_sgs, i) { | |
859 | dwc2_gadget_fill_nonisoc_xfer_ddma_one(hs_ep, &desc, | |
860 | sg_dma_address(sg) + sg->offset, sg_dma_len(sg), | |
861 | sg_is_last(sg)); | |
862 | desc_count += hs_ep->desc_count; | |
863 | } | |
864 | ||
865 | hs_ep->desc_count = desc_count; | |
e02f9aa6 VA |
866 | } |
867 | ||
540ccba0 VA |
868 | /* |
869 | * dwc2_gadget_fill_isoc_desc - fills next isochronous descriptor in chain. | |
870 | * @hs_ep: The isochronous endpoint. | |
871 | * @dma_buff: usb requests dma buffer. | |
872 | * @len: usb request transfer length. | |
873 | * | |
729cac69 | 874 | * Fills next free descriptor with the data of the arrived usb request, |
540ccba0 VA |
875 | * frame info, sets Last and IOC bits increments next_desc. If filled |
876 | * descriptor is not the first one, removes L bit from the previous descriptor | |
877 | * status. | |
878 | */ | |
879 | static int dwc2_gadget_fill_isoc_desc(struct dwc2_hsotg_ep *hs_ep, | |
880 | dma_addr_t dma_buff, unsigned int len) | |
881 | { | |
882 | struct dwc2_dma_desc *desc; | |
883 | struct dwc2_hsotg *hsotg = hs_ep->parent; | |
884 | u32 index; | |
885 | u32 maxsize = 0; | |
886 | u32 mask = 0; | |
1d8e5c00 | 887 | u8 pid = 0; |
540ccba0 VA |
888 | |
889 | maxsize = dwc2_gadget_get_desc_params(hs_ep, &mask); | |
540ccba0 | 890 | |
729cac69 MH |
891 | index = hs_ep->next_desc; |
892 | desc = &hs_ep->desc_list[index]; | |
540ccba0 | 893 | |
729cac69 MH |
894 | /* Check if descriptor chain full */ |
895 | if ((desc->status >> DEV_DMA_BUFF_STS_SHIFT) == | |
896 | DEV_DMA_BUFF_STS_HREADY) { | |
897 | dev_dbg(hsotg->dev, "%s: desc chain full\n", __func__); | |
898 | return 1; | |
540ccba0 VA |
899 | } |
900 | ||
540ccba0 VA |
901 | /* Clear L bit of previous desc if more than one entries in the chain */ |
902 | if (hs_ep->next_desc) | |
903 | hs_ep->desc_list[index - 1].status &= ~DEV_DMA_L; | |
904 | ||
905 | dev_dbg(hsotg->dev, "%s: Filling ep %d, dir %s isoc desc # %d\n", | |
906 | __func__, hs_ep->index, hs_ep->dir_in ? "in" : "out", index); | |
907 | ||
908 | desc->status = 0; | |
909 | desc->status |= (DEV_DMA_BUFF_STS_HBUSY << DEV_DMA_BUFF_STS_SHIFT); | |
910 | ||
911 | desc->buf = dma_buff; | |
912 | desc->status |= (DEV_DMA_L | DEV_DMA_IOC | | |
913 | ((len << DEV_DMA_NBYTES_SHIFT) & mask)); | |
914 | ||
915 | if (hs_ep->dir_in) { | |
1d8e5c00 MH |
916 | if (len) |
917 | pid = DIV_ROUND_UP(len, hs_ep->ep.maxpacket); | |
918 | else | |
919 | pid = 1; | |
920 | desc->status |= ((pid << DEV_DMA_ISOC_PID_SHIFT) & | |
540ccba0 VA |
921 | DEV_DMA_ISOC_PID_MASK) | |
922 | ((len % hs_ep->ep.maxpacket) ? | |
923 | DEV_DMA_SHORT : 0) | | |
924 | ((hs_ep->target_frame << | |
925 | DEV_DMA_ISOC_FRNUM_SHIFT) & | |
926 | DEV_DMA_ISOC_FRNUM_MASK); | |
927 | } | |
928 | ||
929 | desc->status &= ~DEV_DMA_BUFF_STS_MASK; | |
930 | desc->status |= (DEV_DMA_BUFF_STS_HREADY << DEV_DMA_BUFF_STS_SHIFT); | |
931 | ||
729cac69 MH |
932 | /* Increment frame number by interval for IN */ |
933 | if (hs_ep->dir_in) | |
934 | dwc2_gadget_incr_frame_num(hs_ep); | |
935 | ||
540ccba0 VA |
936 | /* Update index of last configured entry in the chain */ |
937 | hs_ep->next_desc++; | |
54f37f56 | 938 | if (hs_ep->next_desc >= MAX_DMA_DESC_NUM_HS_ISOC) |
729cac69 | 939 | hs_ep->next_desc = 0; |
540ccba0 VA |
940 | |
941 | return 0; | |
942 | } | |
943 | ||
944 | /* | |
945 | * dwc2_gadget_start_isoc_ddma - start isochronous transfer in DDMA | |
946 | * @hs_ep: The isochronous endpoint. | |
947 | * | |
729cac69 | 948 | * Prepare descriptor chain for isochronous endpoints. Afterwards |
540ccba0 | 949 | * write DMA address to HW and enable the endpoint. |
540ccba0 VA |
950 | */ |
951 | static void dwc2_gadget_start_isoc_ddma(struct dwc2_hsotg_ep *hs_ep) | |
952 | { | |
953 | struct dwc2_hsotg *hsotg = hs_ep->parent; | |
954 | struct dwc2_hsotg_req *hs_req, *treq; | |
955 | int index = hs_ep->index; | |
956 | int ret; | |
729cac69 | 957 | int i; |
540ccba0 VA |
958 | u32 dma_reg; |
959 | u32 depctl; | |
960 | u32 ctrl; | |
729cac69 | 961 | struct dwc2_dma_desc *desc; |
540ccba0 VA |
962 | |
963 | if (list_empty(&hs_ep->queue)) { | |
1ffba905 | 964 | hs_ep->target_frame = TARGET_FRAME_INITIAL; |
540ccba0 VA |
965 | dev_dbg(hsotg->dev, "%s: No requests in queue\n", __func__); |
966 | return; | |
967 | } | |
968 | ||
729cac69 | 969 | /* Initialize descriptor chain by Host Busy status */ |
54f37f56 | 970 | for (i = 0; i < MAX_DMA_DESC_NUM_HS_ISOC; i++) { |
729cac69 MH |
971 | desc = &hs_ep->desc_list[i]; |
972 | desc->status = 0; | |
973 | desc->status |= (DEV_DMA_BUFF_STS_HBUSY | |
974 | << DEV_DMA_BUFF_STS_SHIFT); | |
975 | } | |
976 | ||
977 | hs_ep->next_desc = 0; | |
540ccba0 | 978 | list_for_each_entry_safe(hs_req, treq, &hs_ep->queue, queue) { |
10209abe AP |
979 | dma_addr_t dma_addr = hs_req->req.dma; |
980 | ||
981 | if (hs_req->req.num_sgs) { | |
982 | WARN_ON(hs_req->req.num_sgs > 1); | |
983 | dma_addr = sg_dma_address(hs_req->req.sg); | |
984 | } | |
985 | ret = dwc2_gadget_fill_isoc_desc(hs_ep, dma_addr, | |
540ccba0 | 986 | hs_req->req.length); |
729cac69 | 987 | if (ret) |
540ccba0 | 988 | break; |
540ccba0 VA |
989 | } |
990 | ||
729cac69 | 991 | hs_ep->compl_desc = 0; |
540ccba0 VA |
992 | depctl = hs_ep->dir_in ? DIEPCTL(index) : DOEPCTL(index); |
993 | dma_reg = hs_ep->dir_in ? DIEPDMA(index) : DOEPDMA(index); | |
994 | ||
995 | /* write descriptor chain address to control register */ | |
f25c42b8 | 996 | dwc2_writel(hsotg, hs_ep->desc_list_dma, dma_reg); |
540ccba0 | 997 | |
f25c42b8 | 998 | ctrl = dwc2_readl(hsotg, depctl); |
540ccba0 | 999 | ctrl |= DXEPCTL_EPENA | DXEPCTL_CNAK; |
f25c42b8 | 1000 | dwc2_writel(hsotg, ctrl, depctl); |
540ccba0 VA |
1001 | } |
1002 | ||
5b7d70c6 | 1003 | /** |
1f91b4cc | 1004 | * dwc2_hsotg_start_req - start a USB request from an endpoint's queue |
5b7d70c6 BD |
1005 | * @hsotg: The controller state. |
1006 | * @hs_ep: The endpoint to process a request for | |
1007 | * @hs_req: The request to start. | |
1008 | * @continuing: True if we are doing more for the current request. | |
1009 | * | |
1010 | * Start the given request running by setting the endpoint registers | |
1011 | * appropriately, and writing any data to the FIFOs. | |
1012 | */ | |
1f91b4cc | 1013 | static void dwc2_hsotg_start_req(struct dwc2_hsotg *hsotg, |
9da51974 | 1014 | struct dwc2_hsotg_ep *hs_ep, |
1f91b4cc | 1015 | struct dwc2_hsotg_req *hs_req, |
5b7d70c6 BD |
1016 | bool continuing) |
1017 | { | |
1018 | struct usb_request *ureq = &hs_req->req; | |
1019 | int index = hs_ep->index; | |
1020 | int dir_in = hs_ep->dir_in; | |
1021 | u32 epctrl_reg; | |
1022 | u32 epsize_reg; | |
1023 | u32 epsize; | |
1024 | u32 ctrl; | |
9da51974 JY |
1025 | unsigned int length; |
1026 | unsigned int packets; | |
1027 | unsigned int maxreq; | |
aa3e8bc8 | 1028 | unsigned int dma_reg; |
5b7d70c6 BD |
1029 | |
1030 | if (index != 0) { | |
1031 | if (hs_ep->req && !continuing) { | |
1032 | dev_err(hsotg->dev, "%s: active request\n", __func__); | |
1033 | WARN_ON(1); | |
1034 | return; | |
1035 | } else if (hs_ep->req != hs_req && continuing) { | |
1036 | dev_err(hsotg->dev, | |
1037 | "%s: continue different req\n", __func__); | |
1038 | WARN_ON(1); | |
1039 | return; | |
1040 | } | |
1041 | } | |
1042 | ||
aa3e8bc8 | 1043 | dma_reg = dir_in ? DIEPDMA(index) : DOEPDMA(index); |
94cb8fd6 LM |
1044 | epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index); |
1045 | epsize_reg = dir_in ? DIEPTSIZ(index) : DOEPTSIZ(index); | |
5b7d70c6 BD |
1046 | |
1047 | dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x, ep %d, dir %s\n", | |
f25c42b8 | 1048 | __func__, dwc2_readl(hsotg, epctrl_reg), index, |
5b7d70c6 BD |
1049 | hs_ep->dir_in ? "in" : "out"); |
1050 | ||
9c39ddc6 | 1051 | /* If endpoint is stalled, we will restart request later */ |
f25c42b8 | 1052 | ctrl = dwc2_readl(hsotg, epctrl_reg); |
9c39ddc6 | 1053 | |
b2d4c54e | 1054 | if (index && ctrl & DXEPCTL_STALL) { |
9c39ddc6 AT |
1055 | dev_warn(hsotg->dev, "%s: ep%d is stalled\n", __func__, index); |
1056 | return; | |
1057 | } | |
1058 | ||
5b7d70c6 | 1059 | length = ureq->length - ureq->actual; |
71225bee LM |
1060 | dev_dbg(hsotg->dev, "ureq->length:%d ureq->actual:%d\n", |
1061 | ureq->length, ureq->actual); | |
5b7d70c6 | 1062 | |
cf77b5fb VA |
1063 | if (!using_desc_dma(hsotg)) |
1064 | maxreq = get_ep_limit(hs_ep); | |
1065 | else | |
1066 | maxreq = dwc2_gadget_get_chain_limit(hs_ep); | |
1067 | ||
5b7d70c6 BD |
1068 | if (length > maxreq) { |
1069 | int round = maxreq % hs_ep->ep.maxpacket; | |
1070 | ||
1071 | dev_dbg(hsotg->dev, "%s: length %d, max-req %d, r %d\n", | |
1072 | __func__, length, maxreq, round); | |
1073 | ||
1074 | /* round down to multiple of packets */ | |
1075 | if (round) | |
1076 | maxreq -= round; | |
1077 | ||
1078 | length = maxreq; | |
1079 | } | |
1080 | ||
1081 | if (length) | |
1082 | packets = DIV_ROUND_UP(length, hs_ep->ep.maxpacket); | |
1083 | else | |
1084 | packets = 1; /* send one packet if length is zero. */ | |
1085 | ||
4fca54aa RB |
1086 | if (hs_ep->isochronous && length > (hs_ep->mc * hs_ep->ep.maxpacket)) { |
1087 | dev_err(hsotg->dev, "req length > maxpacket*mc\n"); | |
1088 | return; | |
1089 | } | |
1090 | ||
5b7d70c6 | 1091 | if (dir_in && index != 0) |
4fca54aa | 1092 | if (hs_ep->isochronous) |
47a1685f | 1093 | epsize = DXEPTSIZ_MC(packets); |
4fca54aa | 1094 | else |
47a1685f | 1095 | epsize = DXEPTSIZ_MC(1); |
5b7d70c6 BD |
1096 | else |
1097 | epsize = 0; | |
1098 | ||
f71b5e25 MYK |
1099 | /* |
1100 | * zero length packet should be programmed on its own and should not | |
1101 | * be counted in DIEPTSIZ.PktCnt with other packets. | |
1102 | */ | |
1103 | if (dir_in && ureq->zero && !continuing) { | |
1104 | /* Test if zlp is actually required. */ | |
1105 | if ((ureq->length >= hs_ep->ep.maxpacket) && | |
9da51974 | 1106 | !(ureq->length % hs_ep->ep.maxpacket)) |
8a20fa45 | 1107 | hs_ep->send_zlp = 1; |
5b7d70c6 BD |
1108 | } |
1109 | ||
47a1685f DN |
1110 | epsize |= DXEPTSIZ_PKTCNT(packets); |
1111 | epsize |= DXEPTSIZ_XFERSIZE(length); | |
5b7d70c6 BD |
1112 | |
1113 | dev_dbg(hsotg->dev, "%s: %d@%d/%d, 0x%08x => 0x%08x\n", | |
1114 | __func__, packets, length, ureq->length, epsize, epsize_reg); | |
1115 | ||
1116 | /* store the request as the current one we're doing */ | |
1117 | hs_ep->req = hs_req; | |
1118 | ||
aa3e8bc8 VA |
1119 | if (using_desc_dma(hsotg)) { |
1120 | u32 offset = 0; | |
1121 | u32 mps = hs_ep->ep.maxpacket; | |
1122 | ||
1123 | /* Adjust length: EP0 - MPS, other OUT EPs - multiple of MPS */ | |
1124 | if (!dir_in) { | |
1125 | if (!index) | |
1126 | length = mps; | |
1127 | else if (length % mps) | |
1128 | length += (mps - (length % mps)); | |
1129 | } | |
5b7d70c6 | 1130 | |
8b9bc460 | 1131 | /* |
aa3e8bc8 VA |
1132 | * If more data to send, adjust DMA for EP0 out data stage. |
1133 | * ureq->dma stays unchanged, hence increment it by already | |
1134 | * passed passed data count before starting new transaction. | |
8b9bc460 | 1135 | */ |
aa3e8bc8 VA |
1136 | if (!index && hsotg->ep0_state == DWC2_EP0_DATA_OUT && |
1137 | continuing) | |
1138 | offset = ureq->actual; | |
1139 | ||
1140 | /* Fill DDMA chain entries */ | |
066cfd07 | 1141 | dwc2_gadget_config_nonisoc_xfer_ddma(hs_ep, ureq->dma + offset, |
aa3e8bc8 VA |
1142 | length); |
1143 | ||
1144 | /* write descriptor chain address to control register */ | |
f25c42b8 | 1145 | dwc2_writel(hsotg, hs_ep->desc_list_dma, dma_reg); |
5b7d70c6 | 1146 | |
aa3e8bc8 VA |
1147 | dev_dbg(hsotg->dev, "%s: %08x pad => 0x%08x\n", |
1148 | __func__, (u32)hs_ep->desc_list_dma, dma_reg); | |
1149 | } else { | |
1150 | /* write size / packets */ | |
f25c42b8 | 1151 | dwc2_writel(hsotg, epsize, epsize_reg); |
aa3e8bc8 | 1152 | |
729e6574 | 1153 | if (using_dma(hsotg) && !continuing && (length != 0)) { |
aa3e8bc8 VA |
1154 | /* |
1155 | * write DMA address to control register, buffer | |
1156 | * already synced by dwc2_hsotg_ep_queue(). | |
1157 | */ | |
5b7d70c6 | 1158 | |
f25c42b8 | 1159 | dwc2_writel(hsotg, ureq->dma, dma_reg); |
aa3e8bc8 VA |
1160 | |
1161 | dev_dbg(hsotg->dev, "%s: %pad => 0x%08x\n", | |
1162 | __func__, &ureq->dma, dma_reg); | |
1163 | } | |
5b7d70c6 BD |
1164 | } |
1165 | ||
837e9f00 VM |
1166 | if (hs_ep->isochronous && hs_ep->interval == 1) { |
1167 | hs_ep->target_frame = dwc2_hsotg_read_frameno(hsotg); | |
1168 | dwc2_gadget_incr_frame_num(hs_ep); | |
1169 | ||
1170 | if (hs_ep->target_frame & 0x1) | |
1171 | ctrl |= DXEPCTL_SETODDFR; | |
1172 | else | |
1173 | ctrl |= DXEPCTL_SETEVENFR; | |
1174 | } | |
1175 | ||
47a1685f | 1176 | ctrl |= DXEPCTL_EPENA; /* ensure ep enabled */ |
71225bee | 1177 | |
fe0b94ab | 1178 | dev_dbg(hsotg->dev, "ep0 state:%d\n", hsotg->ep0_state); |
71225bee LM |
1179 | |
1180 | /* For Setup request do not clear NAK */ | |
fe0b94ab | 1181 | if (!(index == 0 && hsotg->ep0_state == DWC2_EP0_SETUP)) |
47a1685f | 1182 | ctrl |= DXEPCTL_CNAK; /* clear NAK set by core */ |
71225bee | 1183 | |
5b7d70c6 | 1184 | dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl); |
f25c42b8 | 1185 | dwc2_writel(hsotg, ctrl, epctrl_reg); |
5b7d70c6 | 1186 | |
8b9bc460 LM |
1187 | /* |
1188 | * set these, it seems that DMA support increments past the end | |
5b7d70c6 | 1189 | * of the packet buffer so we need to calculate the length from |
8b9bc460 LM |
1190 | * this information. |
1191 | */ | |
5b7d70c6 BD |
1192 | hs_ep->size_loaded = length; |
1193 | hs_ep->last_load = ureq->actual; | |
1194 | ||
1195 | if (dir_in && !using_dma(hsotg)) { | |
1196 | /* set these anyway, we may need them for non-periodic in */ | |
1197 | hs_ep->fifo_load = 0; | |
1198 | ||
1f91b4cc | 1199 | dwc2_hsotg_write_fifo(hsotg, hs_ep, hs_req); |
5b7d70c6 BD |
1200 | } |
1201 | ||
8b9bc460 LM |
1202 | /* |
1203 | * Note, trying to clear the NAK here causes problems with transmit | |
1204 | * on the S3C6400 ending up with the TXFIFO becoming full. | |
1205 | */ | |
5b7d70c6 BD |
1206 | |
1207 | /* check ep is enabled */ | |
f25c42b8 | 1208 | if (!(dwc2_readl(hsotg, epctrl_reg) & DXEPCTL_EPENA)) |
1a0ed863 | 1209 | dev_dbg(hsotg->dev, |
9da51974 | 1210 | "ep%d: failed to become enabled (DXEPCTL=0x%08x)?\n", |
f25c42b8 | 1211 | index, dwc2_readl(hsotg, epctrl_reg)); |
5b7d70c6 | 1212 | |
47a1685f | 1213 | dev_dbg(hsotg->dev, "%s: DXEPCTL=0x%08x\n", |
f25c42b8 | 1214 | __func__, dwc2_readl(hsotg, epctrl_reg)); |
afcf4169 RB |
1215 | |
1216 | /* enable ep interrupts */ | |
1f91b4cc | 1217 | dwc2_hsotg_ctrl_epint(hsotg, hs_ep->index, hs_ep->dir_in, 1); |
5b7d70c6 BD |
1218 | } |
1219 | ||
1220 | /** | |
1f91b4cc | 1221 | * dwc2_hsotg_map_dma - map the DMA memory being used for the request |
5b7d70c6 BD |
1222 | * @hsotg: The device state. |
1223 | * @hs_ep: The endpoint the request is on. | |
1224 | * @req: The request being processed. | |
1225 | * | |
1226 | * We've been asked to queue a request, so ensure that the memory buffer | |
1227 | * is correctly setup for DMA. If we've been passed an extant DMA address | |
1228 | * then ensure the buffer has been synced to memory. If our buffer has no | |
1229 | * DMA memory, then we map the memory and mark our request to allow us to | |
1230 | * cleanup on completion. | |
8b9bc460 | 1231 | */ |
1f91b4cc | 1232 | static int dwc2_hsotg_map_dma(struct dwc2_hsotg *hsotg, |
9da51974 | 1233 | struct dwc2_hsotg_ep *hs_ep, |
5b7d70c6 BD |
1234 | struct usb_request *req) |
1235 | { | |
e58ebcd1 | 1236 | int ret; |
5b7d70c6 | 1237 | |
e58ebcd1 FB |
1238 | ret = usb_gadget_map_request(&hsotg->gadget, req, hs_ep->dir_in); |
1239 | if (ret) | |
1240 | goto dma_error; | |
5b7d70c6 BD |
1241 | |
1242 | return 0; | |
1243 | ||
1244 | dma_error: | |
1245 | dev_err(hsotg->dev, "%s: failed to map buffer %p, %d bytes\n", | |
1246 | __func__, req->buf, req->length); | |
1247 | ||
1248 | return -EIO; | |
1249 | } | |
1250 | ||
1f91b4cc | 1251 | static int dwc2_hsotg_handle_unaligned_buf_start(struct dwc2_hsotg *hsotg, |
b98866c2 JY |
1252 | struct dwc2_hsotg_ep *hs_ep, |
1253 | struct dwc2_hsotg_req *hs_req) | |
7d24c1b5 MYK |
1254 | { |
1255 | void *req_buf = hs_req->req.buf; | |
1256 | ||
1257 | /* If dma is not being used or buffer is aligned */ | |
1258 | if (!using_dma(hsotg) || !((long)req_buf & 3)) | |
1259 | return 0; | |
1260 | ||
1261 | WARN_ON(hs_req->saved_req_buf); | |
1262 | ||
1263 | dev_dbg(hsotg->dev, "%s: %s: buf=%p length=%d\n", __func__, | |
9da51974 | 1264 | hs_ep->ep.name, req_buf, hs_req->req.length); |
7d24c1b5 MYK |
1265 | |
1266 | hs_req->req.buf = kmalloc(hs_req->req.length, GFP_ATOMIC); | |
1267 | if (!hs_req->req.buf) { | |
1268 | hs_req->req.buf = req_buf; | |
1269 | dev_err(hsotg->dev, | |
1270 | "%s: unable to allocate memory for bounce buffer\n", | |
1271 | __func__); | |
1272 | return -ENOMEM; | |
1273 | } | |
1274 | ||
1275 | /* Save actual buffer */ | |
1276 | hs_req->saved_req_buf = req_buf; | |
1277 | ||
1278 | if (hs_ep->dir_in) | |
1279 | memcpy(hs_req->req.buf, req_buf, hs_req->req.length); | |
1280 | return 0; | |
1281 | } | |
1282 | ||
b98866c2 JY |
1283 | static void |
1284 | dwc2_hsotg_handle_unaligned_buf_complete(struct dwc2_hsotg *hsotg, | |
1285 | struct dwc2_hsotg_ep *hs_ep, | |
1286 | struct dwc2_hsotg_req *hs_req) | |
7d24c1b5 MYK |
1287 | { |
1288 | /* If dma is not being used or buffer was aligned */ | |
1289 | if (!using_dma(hsotg) || !hs_req->saved_req_buf) | |
1290 | return; | |
1291 | ||
1292 | dev_dbg(hsotg->dev, "%s: %s: status=%d actual-length=%d\n", __func__, | |
1293 | hs_ep->ep.name, hs_req->req.status, hs_req->req.actual); | |
1294 | ||
1295 | /* Copy data from bounce buffer on successful out transfer */ | |
1296 | if (!hs_ep->dir_in && !hs_req->req.status) | |
1297 | memcpy(hs_req->saved_req_buf, hs_req->req.buf, | |
9da51974 | 1298 | hs_req->req.actual); |
7d24c1b5 MYK |
1299 | |
1300 | /* Free bounce buffer */ | |
1301 | kfree(hs_req->req.buf); | |
1302 | ||
1303 | hs_req->req.buf = hs_req->saved_req_buf; | |
1304 | hs_req->saved_req_buf = NULL; | |
1305 | } | |
1306 | ||
381fc8f8 VM |
1307 | /** |
1308 | * dwc2_gadget_target_frame_elapsed - Checks target frame | |
1309 | * @hs_ep: The driver endpoint to check | |
1310 | * | |
1311 | * Returns 1 if targeted frame elapsed. If returned 1 then we need to drop | |
1312 | * corresponding transfer. | |
1313 | */ | |
1314 | static bool dwc2_gadget_target_frame_elapsed(struct dwc2_hsotg_ep *hs_ep) | |
1315 | { | |
1316 | struct dwc2_hsotg *hsotg = hs_ep->parent; | |
1317 | u32 target_frame = hs_ep->target_frame; | |
c7c24e7a | 1318 | u32 current_frame = hsotg->frame_number; |
381fc8f8 VM |
1319 | bool frame_overrun = hs_ep->frame_overrun; |
1320 | ||
1321 | if (!frame_overrun && current_frame >= target_frame) | |
1322 | return true; | |
1323 | ||
1324 | if (frame_overrun && current_frame >= target_frame && | |
1325 | ((current_frame - target_frame) < DSTS_SOFFN_LIMIT / 2)) | |
1326 | return true; | |
1327 | ||
1328 | return false; | |
1329 | } | |
1330 | ||
e02f9aa6 VA |
1331 | /* |
1332 | * dwc2_gadget_set_ep0_desc_chain - Set EP's desc chain pointers | |
1333 | * @hsotg: The driver state | |
1334 | * @hs_ep: the ep descriptor chain is for | |
1335 | * | |
1336 | * Called to update EP0 structure's pointers depend on stage of | |
1337 | * control transfer. | |
1338 | */ | |
1339 | static int dwc2_gadget_set_ep0_desc_chain(struct dwc2_hsotg *hsotg, | |
1340 | struct dwc2_hsotg_ep *hs_ep) | |
1341 | { | |
1342 | switch (hsotg->ep0_state) { | |
1343 | case DWC2_EP0_SETUP: | |
1344 | case DWC2_EP0_STATUS_OUT: | |
1345 | hs_ep->desc_list = hsotg->setup_desc[0]; | |
1346 | hs_ep->desc_list_dma = hsotg->setup_desc_dma[0]; | |
1347 | break; | |
1348 | case DWC2_EP0_DATA_IN: | |
1349 | case DWC2_EP0_STATUS_IN: | |
1350 | hs_ep->desc_list = hsotg->ctrl_in_desc; | |
1351 | hs_ep->desc_list_dma = hsotg->ctrl_in_desc_dma; | |
1352 | break; | |
1353 | case DWC2_EP0_DATA_OUT: | |
1354 | hs_ep->desc_list = hsotg->ctrl_out_desc; | |
1355 | hs_ep->desc_list_dma = hsotg->ctrl_out_desc_dma; | |
1356 | break; | |
1357 | default: | |
1358 | dev_err(hsotg->dev, "invalid EP 0 state in queue %d\n", | |
1359 | hsotg->ep0_state); | |
1360 | return -EINVAL; | |
1361 | } | |
1362 | ||
1363 | return 0; | |
1364 | } | |
1365 | ||
1f91b4cc | 1366 | static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req, |
9da51974 | 1367 | gfp_t gfp_flags) |
5b7d70c6 | 1368 | { |
1f91b4cc FB |
1369 | struct dwc2_hsotg_req *hs_req = our_req(req); |
1370 | struct dwc2_hsotg_ep *hs_ep = our_ep(ep); | |
941fcce4 | 1371 | struct dwc2_hsotg *hs = hs_ep->parent; |
5b7d70c6 | 1372 | bool first; |
7d24c1b5 | 1373 | int ret; |
729cac69 MH |
1374 | u32 maxsize = 0; |
1375 | u32 mask = 0; | |
1376 | ||
5b7d70c6 BD |
1377 | |
1378 | dev_dbg(hs->dev, "%s: req %p: %d@%p, noi=%d, zero=%d, snok=%d\n", | |
1379 | ep->name, req, req->length, req->buf, req->no_interrupt, | |
1380 | req->zero, req->short_not_ok); | |
1381 | ||
7ababa92 | 1382 | /* Prevent new request submission when controller is suspended */ |
88b02f2c GT |
1383 | if (hs->lx_state != DWC2_L0) { |
1384 | dev_dbg(hs->dev, "%s: submit request only in active state\n", | |
9da51974 | 1385 | __func__); |
7ababa92 GH |
1386 | return -EAGAIN; |
1387 | } | |
1388 | ||
5b7d70c6 BD |
1389 | /* initialise status of the request */ |
1390 | INIT_LIST_HEAD(&hs_req->queue); | |
1391 | req->actual = 0; | |
1392 | req->status = -EINPROGRESS; | |
1393 | ||
729cac69 MH |
1394 | /* In DDMA mode for ISOC's don't queue request if length greater |
1395 | * than descriptor limits. | |
1396 | */ | |
1397 | if (using_desc_dma(hs) && hs_ep->isochronous) { | |
1398 | maxsize = dwc2_gadget_get_desc_params(hs_ep, &mask); | |
1399 | if (hs_ep->dir_in && req->length > maxsize) { | |
1400 | dev_err(hs->dev, "wrong length %d (maxsize=%d)\n", | |
1401 | req->length, maxsize); | |
1402 | return -EINVAL; | |
1403 | } | |
1404 | ||
1405 | if (!hs_ep->dir_in && req->length > hs_ep->ep.maxpacket) { | |
1406 | dev_err(hs->dev, "ISOC OUT: wrong length %d (mps=%d)\n", | |
1407 | req->length, hs_ep->ep.maxpacket); | |
1408 | return -EINVAL; | |
1409 | } | |
1410 | } | |
1411 | ||
1f91b4cc | 1412 | ret = dwc2_hsotg_handle_unaligned_buf_start(hs, hs_ep, hs_req); |
7d24c1b5 MYK |
1413 | if (ret) |
1414 | return ret; | |
1415 | ||
5b7d70c6 BD |
1416 | /* if we're using DMA, sync the buffers as necessary */ |
1417 | if (using_dma(hs)) { | |
1f91b4cc | 1418 | ret = dwc2_hsotg_map_dma(hs, hs_ep, req); |
5b7d70c6 BD |
1419 | if (ret) |
1420 | return ret; | |
1421 | } | |
e02f9aa6 VA |
1422 | /* If using descriptor DMA configure EP0 descriptor chain pointers */ |
1423 | if (using_desc_dma(hs) && !hs_ep->index) { | |
1424 | ret = dwc2_gadget_set_ep0_desc_chain(hs, hs_ep); | |
1425 | if (ret) | |
1426 | return ret; | |
1427 | } | |
5b7d70c6 | 1428 | |
5b7d70c6 BD |
1429 | first = list_empty(&hs_ep->queue); |
1430 | list_add_tail(&hs_req->queue, &hs_ep->queue); | |
1431 | ||
540ccba0 VA |
1432 | /* |
1433 | * Handle DDMA isochronous transfers separately - just add new entry | |
729cac69 | 1434 | * to the descriptor chain. |
540ccba0 VA |
1435 | * Transfer will be started once SW gets either one of NAK or |
1436 | * OutTknEpDis interrupts. | |
1437 | */ | |
729cac69 MH |
1438 | if (using_desc_dma(hs) && hs_ep->isochronous) { |
1439 | if (hs_ep->target_frame != TARGET_FRAME_INITIAL) { | |
10209abe AP |
1440 | dma_addr_t dma_addr = hs_req->req.dma; |
1441 | ||
1442 | if (hs_req->req.num_sgs) { | |
1443 | WARN_ON(hs_req->req.num_sgs > 1); | |
1444 | dma_addr = sg_dma_address(hs_req->req.sg); | |
1445 | } | |
1446 | dwc2_gadget_fill_isoc_desc(hs_ep, dma_addr, | |
729cac69 MH |
1447 | hs_req->req.length); |
1448 | } | |
540ccba0 VA |
1449 | return 0; |
1450 | } | |
1451 | ||
b4c53b4a MH |
1452 | /* Change EP direction if status phase request is after data out */ |
1453 | if (!hs_ep->index && !req->length && !hs_ep->dir_in && | |
1454 | hs->ep0_state == DWC2_EP0_DATA_OUT) | |
1455 | hs_ep->dir_in = 1; | |
1456 | ||
837e9f00 VM |
1457 | if (first) { |
1458 | if (!hs_ep->isochronous) { | |
1459 | dwc2_hsotg_start_req(hs, hs_ep, hs_req, false); | |
1460 | return 0; | |
1461 | } | |
1462 | ||
c7c24e7a AP |
1463 | /* Update current frame number value. */ |
1464 | hs->frame_number = dwc2_hsotg_read_frameno(hs); | |
1465 | while (dwc2_gadget_target_frame_elapsed(hs_ep)) { | |
837e9f00 | 1466 | dwc2_gadget_incr_frame_num(hs_ep); |
c7c24e7a AP |
1467 | /* Update current frame number value once more as it |
1468 | * changes here. | |
1469 | */ | |
1470 | hs->frame_number = dwc2_hsotg_read_frameno(hs); | |
1471 | } | |
5b7d70c6 | 1472 | |
837e9f00 VM |
1473 | if (hs_ep->target_frame != TARGET_FRAME_INITIAL) |
1474 | dwc2_hsotg_start_req(hs, hs_ep, hs_req, false); | |
1475 | } | |
5b7d70c6 BD |
1476 | return 0; |
1477 | } | |
1478 | ||
1f91b4cc | 1479 | static int dwc2_hsotg_ep_queue_lock(struct usb_ep *ep, struct usb_request *req, |
9da51974 | 1480 | gfp_t gfp_flags) |
5ad1d316 | 1481 | { |
1f91b4cc | 1482 | struct dwc2_hsotg_ep *hs_ep = our_ep(ep); |
941fcce4 | 1483 | struct dwc2_hsotg *hs = hs_ep->parent; |
5ad1d316 LM |
1484 | unsigned long flags = 0; |
1485 | int ret = 0; | |
1486 | ||
1487 | spin_lock_irqsave(&hs->lock, flags); | |
1f91b4cc | 1488 | ret = dwc2_hsotg_ep_queue(ep, req, gfp_flags); |
5ad1d316 LM |
1489 | spin_unlock_irqrestore(&hs->lock, flags); |
1490 | ||
1491 | return ret; | |
1492 | } | |
1493 | ||
1f91b4cc | 1494 | static void dwc2_hsotg_ep_free_request(struct usb_ep *ep, |
9da51974 | 1495 | struct usb_request *req) |
5b7d70c6 | 1496 | { |
1f91b4cc | 1497 | struct dwc2_hsotg_req *hs_req = our_req(req); |
5b7d70c6 BD |
1498 | |
1499 | kfree(hs_req); | |
1500 | } | |
1501 | ||
1502 | /** | |
1f91b4cc | 1503 | * dwc2_hsotg_complete_oursetup - setup completion callback |
5b7d70c6 BD |
1504 | * @ep: The endpoint the request was on. |
1505 | * @req: The request completed. | |
1506 | * | |
1507 | * Called on completion of any requests the driver itself | |
1508 | * submitted that need cleaning up. | |
1509 | */ | |
1f91b4cc | 1510 | static void dwc2_hsotg_complete_oursetup(struct usb_ep *ep, |
9da51974 | 1511 | struct usb_request *req) |
5b7d70c6 | 1512 | { |
1f91b4cc | 1513 | struct dwc2_hsotg_ep *hs_ep = our_ep(ep); |
941fcce4 | 1514 | struct dwc2_hsotg *hsotg = hs_ep->parent; |
5b7d70c6 BD |
1515 | |
1516 | dev_dbg(hsotg->dev, "%s: ep %p, req %p\n", __func__, ep, req); | |
1517 | ||
1f91b4cc | 1518 | dwc2_hsotg_ep_free_request(ep, req); |
5b7d70c6 BD |
1519 | } |
1520 | ||
1521 | /** | |
1522 | * ep_from_windex - convert control wIndex value to endpoint | |
1523 | * @hsotg: The driver state. | |
1524 | * @windex: The control request wIndex field (in host order). | |
1525 | * | |
1526 | * Convert the given wIndex into a pointer to an driver endpoint | |
1527 | * structure, or return NULL if it is not a valid endpoint. | |
8b9bc460 | 1528 | */ |
1f91b4cc | 1529 | static struct dwc2_hsotg_ep *ep_from_windex(struct dwc2_hsotg *hsotg, |
9da51974 | 1530 | u32 windex) |
5b7d70c6 | 1531 | { |
1f91b4cc | 1532 | struct dwc2_hsotg_ep *ep; |
5b7d70c6 BD |
1533 | int dir = (windex & USB_DIR_IN) ? 1 : 0; |
1534 | int idx = windex & 0x7F; | |
1535 | ||
1536 | if (windex >= 0x100) | |
1537 | return NULL; | |
1538 | ||
b3f489b2 | 1539 | if (idx > hsotg->num_of_eps) |
5b7d70c6 BD |
1540 | return NULL; |
1541 | ||
c6f5c050 MYK |
1542 | ep = index_to_ep(hsotg, idx, dir); |
1543 | ||
5b7d70c6 BD |
1544 | if (idx && ep->dir_in != dir) |
1545 | return NULL; | |
1546 | ||
1547 | return ep; | |
1548 | } | |
1549 | ||
9e14d0a5 | 1550 | /** |
1f91b4cc | 1551 | * dwc2_hsotg_set_test_mode - Enable usb Test Modes |
9e14d0a5 GH |
1552 | * @hsotg: The driver state. |
1553 | * @testmode: requested usb test mode | |
1554 | * Enable usb Test Mode requested by the Host. | |
1555 | */ | |
1f91b4cc | 1556 | int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode) |
9e14d0a5 | 1557 | { |
f25c42b8 | 1558 | int dctl = dwc2_readl(hsotg, DCTL); |
9e14d0a5 GH |
1559 | |
1560 | dctl &= ~DCTL_TSTCTL_MASK; | |
1561 | switch (testmode) { | |
1562 | case TEST_J: | |
1563 | case TEST_K: | |
1564 | case TEST_SE0_NAK: | |
1565 | case TEST_PACKET: | |
1566 | case TEST_FORCE_EN: | |
1567 | dctl |= testmode << DCTL_TSTCTL_SHIFT; | |
1568 | break; | |
1569 | default: | |
1570 | return -EINVAL; | |
1571 | } | |
f25c42b8 | 1572 | dwc2_writel(hsotg, dctl, DCTL); |
9e14d0a5 GH |
1573 | return 0; |
1574 | } | |
1575 | ||
5b7d70c6 | 1576 | /** |
1f91b4cc | 1577 | * dwc2_hsotg_send_reply - send reply to control request |
5b7d70c6 BD |
1578 | * @hsotg: The device state |
1579 | * @ep: Endpoint 0 | |
1580 | * @buff: Buffer for request | |
1581 | * @length: Length of reply. | |
1582 | * | |
1583 | * Create a request and queue it on the given endpoint. This is useful as | |
1584 | * an internal method of sending replies to certain control requests, etc. | |
1585 | */ | |
1f91b4cc | 1586 | static int dwc2_hsotg_send_reply(struct dwc2_hsotg *hsotg, |
9da51974 | 1587 | struct dwc2_hsotg_ep *ep, |
5b7d70c6 BD |
1588 | void *buff, |
1589 | int length) | |
1590 | { | |
1591 | struct usb_request *req; | |
1592 | int ret; | |
1593 | ||
1594 | dev_dbg(hsotg->dev, "%s: buff %p, len %d\n", __func__, buff, length); | |
1595 | ||
1f91b4cc | 1596 | req = dwc2_hsotg_ep_alloc_request(&ep->ep, GFP_ATOMIC); |
5b7d70c6 BD |
1597 | hsotg->ep0_reply = req; |
1598 | if (!req) { | |
1599 | dev_warn(hsotg->dev, "%s: cannot alloc req\n", __func__); | |
1600 | return -ENOMEM; | |
1601 | } | |
1602 | ||
1603 | req->buf = hsotg->ep0_buff; | |
1604 | req->length = length; | |
f71b5e25 MYK |
1605 | /* |
1606 | * zero flag is for sending zlp in DATA IN stage. It has no impact on | |
1607 | * STATUS stage. | |
1608 | */ | |
1609 | req->zero = 0; | |
1f91b4cc | 1610 | req->complete = dwc2_hsotg_complete_oursetup; |
5b7d70c6 BD |
1611 | |
1612 | if (length) | |
1613 | memcpy(req->buf, buff, length); | |
5b7d70c6 | 1614 | |
1f91b4cc | 1615 | ret = dwc2_hsotg_ep_queue(&ep->ep, req, GFP_ATOMIC); |
5b7d70c6 BD |
1616 | if (ret) { |
1617 | dev_warn(hsotg->dev, "%s: cannot queue req\n", __func__); | |
1618 | return ret; | |
1619 | } | |
1620 | ||
1621 | return 0; | |
1622 | } | |
1623 | ||
1624 | /** | |
1f91b4cc | 1625 | * dwc2_hsotg_process_req_status - process request GET_STATUS |
5b7d70c6 BD |
1626 | * @hsotg: The device state |
1627 | * @ctrl: USB control request | |
1628 | */ | |
1f91b4cc | 1629 | static int dwc2_hsotg_process_req_status(struct dwc2_hsotg *hsotg, |
9da51974 | 1630 | struct usb_ctrlrequest *ctrl) |
5b7d70c6 | 1631 | { |
1f91b4cc FB |
1632 | struct dwc2_hsotg_ep *ep0 = hsotg->eps_out[0]; |
1633 | struct dwc2_hsotg_ep *ep; | |
5b7d70c6 BD |
1634 | __le16 reply; |
1635 | int ret; | |
1636 | ||
1637 | dev_dbg(hsotg->dev, "%s: USB_REQ_GET_STATUS\n", __func__); | |
1638 | ||
1639 | if (!ep0->dir_in) { | |
1640 | dev_warn(hsotg->dev, "%s: direction out?\n", __func__); | |
1641 | return -EINVAL; | |
1642 | } | |
1643 | ||
1644 | switch (ctrl->bRequestType & USB_RECIP_MASK) { | |
1645 | case USB_RECIP_DEVICE: | |
38beaec6 JY |
1646 | /* |
1647 | * bit 0 => self powered | |
1648 | * bit 1 => remote wakeup | |
1649 | */ | |
1650 | reply = cpu_to_le16(0); | |
5b7d70c6 BD |
1651 | break; |
1652 | ||
1653 | case USB_RECIP_INTERFACE: | |
1654 | /* currently, the data result should be zero */ | |
1655 | reply = cpu_to_le16(0); | |
1656 | break; | |
1657 | ||
1658 | case USB_RECIP_ENDPOINT: | |
1659 | ep = ep_from_windex(hsotg, le16_to_cpu(ctrl->wIndex)); | |
1660 | if (!ep) | |
1661 | return -ENOENT; | |
1662 | ||
1663 | reply = cpu_to_le16(ep->halted ? 1 : 0); | |
1664 | break; | |
1665 | ||
1666 | default: | |
1667 | return 0; | |
1668 | } | |
1669 | ||
1670 | if (le16_to_cpu(ctrl->wLength) != 2) | |
1671 | return -EINVAL; | |
1672 | ||
1f91b4cc | 1673 | ret = dwc2_hsotg_send_reply(hsotg, ep0, &reply, 2); |
5b7d70c6 BD |
1674 | if (ret) { |
1675 | dev_err(hsotg->dev, "%s: failed to send reply\n", __func__); | |
1676 | return ret; | |
1677 | } | |
1678 | ||
1679 | return 1; | |
1680 | } | |
1681 | ||
51da43b5 | 1682 | static int dwc2_hsotg_ep_sethalt(struct usb_ep *ep, int value, bool now); |
5b7d70c6 | 1683 | |
9c39ddc6 AT |
1684 | /** |
1685 | * get_ep_head - return the first request on the endpoint | |
1686 | * @hs_ep: The controller endpoint to get | |
1687 | * | |
1688 | * Get the first request on the endpoint. | |
1689 | */ | |
1f91b4cc | 1690 | static struct dwc2_hsotg_req *get_ep_head(struct dwc2_hsotg_ep *hs_ep) |
9c39ddc6 | 1691 | { |
ffc4b406 MY |
1692 | return list_first_entry_or_null(&hs_ep->queue, struct dwc2_hsotg_req, |
1693 | queue); | |
9c39ddc6 AT |
1694 | } |
1695 | ||
41cc4cd2 VM |
1696 | /** |
1697 | * dwc2_gadget_start_next_request - Starts next request from ep queue | |
1698 | * @hs_ep: Endpoint structure | |
1699 | * | |
1700 | * If queue is empty and EP is ISOC-OUT - unmasks OUTTKNEPDIS which is masked | |
1701 | * in its handler. Hence we need to unmask it here to be able to do | |
1702 | * resynchronization. | |
1703 | */ | |
1704 | static void dwc2_gadget_start_next_request(struct dwc2_hsotg_ep *hs_ep) | |
1705 | { | |
1706 | u32 mask; | |
1707 | struct dwc2_hsotg *hsotg = hs_ep->parent; | |
1708 | int dir_in = hs_ep->dir_in; | |
1709 | struct dwc2_hsotg_req *hs_req; | |
1710 | u32 epmsk_reg = dir_in ? DIEPMSK : DOEPMSK; | |
1711 | ||
1712 | if (!list_empty(&hs_ep->queue)) { | |
1713 | hs_req = get_ep_head(hs_ep); | |
1714 | dwc2_hsotg_start_req(hsotg, hs_ep, hs_req, false); | |
1715 | return; | |
1716 | } | |
1717 | if (!hs_ep->isochronous) | |
1718 | return; | |
1719 | ||
1720 | if (dir_in) { | |
1721 | dev_dbg(hsotg->dev, "%s: No more ISOC-IN requests\n", | |
1722 | __func__); | |
1723 | } else { | |
1724 | dev_dbg(hsotg->dev, "%s: No more ISOC-OUT requests\n", | |
1725 | __func__); | |
f25c42b8 | 1726 | mask = dwc2_readl(hsotg, epmsk_reg); |
41cc4cd2 | 1727 | mask |= DOEPMSK_OUTTKNEPDISMSK; |
f25c42b8 | 1728 | dwc2_writel(hsotg, mask, epmsk_reg); |
41cc4cd2 VM |
1729 | } |
1730 | } | |
1731 | ||
5b7d70c6 | 1732 | /** |
1f91b4cc | 1733 | * dwc2_hsotg_process_req_feature - process request {SET,CLEAR}_FEATURE |
5b7d70c6 BD |
1734 | * @hsotg: The device state |
1735 | * @ctrl: USB control request | |
1736 | */ | |
1f91b4cc | 1737 | static int dwc2_hsotg_process_req_feature(struct dwc2_hsotg *hsotg, |
9da51974 | 1738 | struct usb_ctrlrequest *ctrl) |
5b7d70c6 | 1739 | { |
1f91b4cc FB |
1740 | struct dwc2_hsotg_ep *ep0 = hsotg->eps_out[0]; |
1741 | struct dwc2_hsotg_req *hs_req; | |
5b7d70c6 | 1742 | bool set = (ctrl->bRequest == USB_REQ_SET_FEATURE); |
1f91b4cc | 1743 | struct dwc2_hsotg_ep *ep; |
26ab3d0c | 1744 | int ret; |
bd9ef7bf | 1745 | bool halted; |
9e14d0a5 GH |
1746 | u32 recip; |
1747 | u32 wValue; | |
1748 | u32 wIndex; | |
5b7d70c6 BD |
1749 | |
1750 | dev_dbg(hsotg->dev, "%s: %s_FEATURE\n", | |
1751 | __func__, set ? "SET" : "CLEAR"); | |
1752 | ||
9e14d0a5 GH |
1753 | wValue = le16_to_cpu(ctrl->wValue); |
1754 | wIndex = le16_to_cpu(ctrl->wIndex); | |
1755 | recip = ctrl->bRequestType & USB_RECIP_MASK; | |
1756 | ||
1757 | switch (recip) { | |
1758 | case USB_RECIP_DEVICE: | |
1759 | switch (wValue) { | |
fa389a6d VM |
1760 | case USB_DEVICE_REMOTE_WAKEUP: |
1761 | hsotg->remote_wakeup_allowed = 1; | |
1762 | break; | |
1763 | ||
9e14d0a5 GH |
1764 | case USB_DEVICE_TEST_MODE: |
1765 | if ((wIndex & 0xff) != 0) | |
1766 | return -EINVAL; | |
1767 | if (!set) | |
1768 | return -EINVAL; | |
1769 | ||
1770 | hsotg->test_mode = wIndex >> 8; | |
1f91b4cc | 1771 | ret = dwc2_hsotg_send_reply(hsotg, ep0, NULL, 0); |
9e14d0a5 GH |
1772 | if (ret) { |
1773 | dev_err(hsotg->dev, | |
1774 | "%s: failed to send reply\n", __func__); | |
1775 | return ret; | |
1776 | } | |
1777 | break; | |
1778 | default: | |
1779 | return -ENOENT; | |
1780 | } | |
1781 | break; | |
1782 | ||
1783 | case USB_RECIP_ENDPOINT: | |
1784 | ep = ep_from_windex(hsotg, wIndex); | |
5b7d70c6 BD |
1785 | if (!ep) { |
1786 | dev_dbg(hsotg->dev, "%s: no endpoint for 0x%04x\n", | |
9e14d0a5 | 1787 | __func__, wIndex); |
5b7d70c6 BD |
1788 | return -ENOENT; |
1789 | } | |
1790 | ||
9e14d0a5 | 1791 | switch (wValue) { |
5b7d70c6 | 1792 | case USB_ENDPOINT_HALT: |
bd9ef7bf RB |
1793 | halted = ep->halted; |
1794 | ||
51da43b5 | 1795 | dwc2_hsotg_ep_sethalt(&ep->ep, set, true); |
26ab3d0c | 1796 | |
1f91b4cc | 1797 | ret = dwc2_hsotg_send_reply(hsotg, ep0, NULL, 0); |
26ab3d0c AT |
1798 | if (ret) { |
1799 | dev_err(hsotg->dev, | |
1800 | "%s: failed to send reply\n", __func__); | |
1801 | return ret; | |
1802 | } | |
9c39ddc6 | 1803 | |
bd9ef7bf RB |
1804 | /* |
1805 | * we have to complete all requests for ep if it was | |
1806 | * halted, and the halt was cleared by CLEAR_FEATURE | |
1807 | */ | |
1808 | ||
1809 | if (!set && halted) { | |
9c39ddc6 AT |
1810 | /* |
1811 | * If we have request in progress, | |
1812 | * then complete it | |
1813 | */ | |
1814 | if (ep->req) { | |
1815 | hs_req = ep->req; | |
1816 | ep->req = NULL; | |
1817 | list_del_init(&hs_req->queue); | |
c00dd4a6 GH |
1818 | if (hs_req->req.complete) { |
1819 | spin_unlock(&hsotg->lock); | |
1820 | usb_gadget_giveback_request( | |
1821 | &ep->ep, &hs_req->req); | |
1822 | spin_lock(&hsotg->lock); | |
1823 | } | |
9c39ddc6 AT |
1824 | } |
1825 | ||
1826 | /* If we have pending request, then start it */ | |
34c0887f | 1827 | if (!ep->req) |
41cc4cd2 | 1828 | dwc2_gadget_start_next_request(ep); |
9c39ddc6 AT |
1829 | } |
1830 | ||
5b7d70c6 BD |
1831 | break; |
1832 | ||
1833 | default: | |
1834 | return -ENOENT; | |
1835 | } | |
9e14d0a5 GH |
1836 | break; |
1837 | default: | |
1838 | return -ENOENT; | |
1839 | } | |
5b7d70c6 BD |
1840 | return 1; |
1841 | } | |
1842 | ||
1f91b4cc | 1843 | static void dwc2_hsotg_enqueue_setup(struct dwc2_hsotg *hsotg); |
ab93e014 | 1844 | |
c9f721b2 | 1845 | /** |
1f91b4cc | 1846 | * dwc2_hsotg_stall_ep0 - stall ep0 |
c9f721b2 RB |
1847 | * @hsotg: The device state |
1848 | * | |
1849 | * Set stall for ep0 as response for setup request. | |
1850 | */ | |
1f91b4cc | 1851 | static void dwc2_hsotg_stall_ep0(struct dwc2_hsotg *hsotg) |
e9ebe7c3 | 1852 | { |
1f91b4cc | 1853 | struct dwc2_hsotg_ep *ep0 = hsotg->eps_out[0]; |
c9f721b2 RB |
1854 | u32 reg; |
1855 | u32 ctrl; | |
1856 | ||
1857 | dev_dbg(hsotg->dev, "ep0 stall (dir=%d)\n", ep0->dir_in); | |
1858 | reg = (ep0->dir_in) ? DIEPCTL0 : DOEPCTL0; | |
1859 | ||
1860 | /* | |
1861 | * DxEPCTL_Stall will be cleared by EP once it has | |
1862 | * taken effect, so no need to clear later. | |
1863 | */ | |
1864 | ||
f25c42b8 | 1865 | ctrl = dwc2_readl(hsotg, reg); |
47a1685f DN |
1866 | ctrl |= DXEPCTL_STALL; |
1867 | ctrl |= DXEPCTL_CNAK; | |
f25c42b8 | 1868 | dwc2_writel(hsotg, ctrl, reg); |
c9f721b2 RB |
1869 | |
1870 | dev_dbg(hsotg->dev, | |
47a1685f | 1871 | "written DXEPCTL=0x%08x to %08x (DXEPCTL=0x%08x)\n", |
f25c42b8 | 1872 | ctrl, reg, dwc2_readl(hsotg, reg)); |
c9f721b2 RB |
1873 | |
1874 | /* | |
1875 | * complete won't be called, so we enqueue | |
1876 | * setup request here | |
1877 | */ | |
1f91b4cc | 1878 | dwc2_hsotg_enqueue_setup(hsotg); |
c9f721b2 RB |
1879 | } |
1880 | ||
5b7d70c6 | 1881 | /** |
1f91b4cc | 1882 | * dwc2_hsotg_process_control - process a control request |
5b7d70c6 BD |
1883 | * @hsotg: The device state |
1884 | * @ctrl: The control request received | |
1885 | * | |
1886 | * The controller has received the SETUP phase of a control request, and | |
1887 | * needs to work out what to do next (and whether to pass it on to the | |
1888 | * gadget driver). | |
1889 | */ | |
1f91b4cc | 1890 | static void dwc2_hsotg_process_control(struct dwc2_hsotg *hsotg, |
9da51974 | 1891 | struct usb_ctrlrequest *ctrl) |
5b7d70c6 | 1892 | { |
1f91b4cc | 1893 | struct dwc2_hsotg_ep *ep0 = hsotg->eps_out[0]; |
5b7d70c6 BD |
1894 | int ret = 0; |
1895 | u32 dcfg; | |
1896 | ||
e525e743 MYK |
1897 | dev_dbg(hsotg->dev, |
1898 | "ctrl Type=%02x, Req=%02x, V=%04x, I=%04x, L=%04x\n", | |
1899 | ctrl->bRequestType, ctrl->bRequest, ctrl->wValue, | |
1900 | ctrl->wIndex, ctrl->wLength); | |
5b7d70c6 | 1901 | |
fe0b94ab MYK |
1902 | if (ctrl->wLength == 0) { |
1903 | ep0->dir_in = 1; | |
1904 | hsotg->ep0_state = DWC2_EP0_STATUS_IN; | |
1905 | } else if (ctrl->bRequestType & USB_DIR_IN) { | |
5b7d70c6 | 1906 | ep0->dir_in = 1; |
fe0b94ab MYK |
1907 | hsotg->ep0_state = DWC2_EP0_DATA_IN; |
1908 | } else { | |
1909 | ep0->dir_in = 0; | |
1910 | hsotg->ep0_state = DWC2_EP0_DATA_OUT; | |
1911 | } | |
5b7d70c6 BD |
1912 | |
1913 | if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { | |
1914 | switch (ctrl->bRequest) { | |
1915 | case USB_REQ_SET_ADDRESS: | |
6d713c15 | 1916 | hsotg->connected = 1; |
f25c42b8 | 1917 | dcfg = dwc2_readl(hsotg, DCFG); |
47a1685f | 1918 | dcfg &= ~DCFG_DEVADDR_MASK; |
d5dbd3f7 PZ |
1919 | dcfg |= (le16_to_cpu(ctrl->wValue) << |
1920 | DCFG_DEVADDR_SHIFT) & DCFG_DEVADDR_MASK; | |
f25c42b8 | 1921 | dwc2_writel(hsotg, dcfg, DCFG); |
5b7d70c6 BD |
1922 | |
1923 | dev_info(hsotg->dev, "new address %d\n", ctrl->wValue); | |
1924 | ||
1f91b4cc | 1925 | ret = dwc2_hsotg_send_reply(hsotg, ep0, NULL, 0); |
5b7d70c6 BD |
1926 | return; |
1927 | ||
1928 | case USB_REQ_GET_STATUS: | |
1f91b4cc | 1929 | ret = dwc2_hsotg_process_req_status(hsotg, ctrl); |
5b7d70c6 BD |
1930 | break; |
1931 | ||
1932 | case USB_REQ_CLEAR_FEATURE: | |
1933 | case USB_REQ_SET_FEATURE: | |
1f91b4cc | 1934 | ret = dwc2_hsotg_process_req_feature(hsotg, ctrl); |
5b7d70c6 BD |
1935 | break; |
1936 | } | |
1937 | } | |
1938 | ||
1939 | /* as a fallback, try delivering it to the driver to deal with */ | |
1940 | ||
1941 | if (ret == 0 && hsotg->driver) { | |
93f599f2 | 1942 | spin_unlock(&hsotg->lock); |
5b7d70c6 | 1943 | ret = hsotg->driver->setup(&hsotg->gadget, ctrl); |
93f599f2 | 1944 | spin_lock(&hsotg->lock); |
5b7d70c6 BD |
1945 | if (ret < 0) |
1946 | dev_dbg(hsotg->dev, "driver->setup() ret %d\n", ret); | |
1947 | } | |
1948 | ||
b4c53b4a MH |
1949 | hsotg->delayed_status = false; |
1950 | if (ret == USB_GADGET_DELAYED_STATUS) | |
1951 | hsotg->delayed_status = true; | |
1952 | ||
8b9bc460 LM |
1953 | /* |
1954 | * the request is either unhandlable, or is not formatted correctly | |
5b7d70c6 BD |
1955 | * so respond with a STALL for the status stage to indicate failure. |
1956 | */ | |
1957 | ||
c9f721b2 | 1958 | if (ret < 0) |
1f91b4cc | 1959 | dwc2_hsotg_stall_ep0(hsotg); |
5b7d70c6 BD |
1960 | } |
1961 | ||
5b7d70c6 | 1962 | /** |
1f91b4cc | 1963 | * dwc2_hsotg_complete_setup - completion of a setup transfer |
5b7d70c6 BD |
1964 | * @ep: The endpoint the request was on. |
1965 | * @req: The request completed. | |
1966 | * | |
1967 | * Called on completion of any requests the driver itself submitted for | |
1968 | * EP0 setup packets | |
1969 | */ | |
1f91b4cc | 1970 | static void dwc2_hsotg_complete_setup(struct usb_ep *ep, |
9da51974 | 1971 | struct usb_request *req) |
5b7d70c6 | 1972 | { |
1f91b4cc | 1973 | struct dwc2_hsotg_ep *hs_ep = our_ep(ep); |
941fcce4 | 1974 | struct dwc2_hsotg *hsotg = hs_ep->parent; |
5b7d70c6 BD |
1975 | |
1976 | if (req->status < 0) { | |
1977 | dev_dbg(hsotg->dev, "%s: failed %d\n", __func__, req->status); | |
1978 | return; | |
1979 | } | |
1980 | ||
93f599f2 | 1981 | spin_lock(&hsotg->lock); |
5b7d70c6 | 1982 | if (req->actual == 0) |
1f91b4cc | 1983 | dwc2_hsotg_enqueue_setup(hsotg); |
5b7d70c6 | 1984 | else |
1f91b4cc | 1985 | dwc2_hsotg_process_control(hsotg, req->buf); |
93f599f2 | 1986 | spin_unlock(&hsotg->lock); |
5b7d70c6 BD |
1987 | } |
1988 | ||
1989 | /** | |
1f91b4cc | 1990 | * dwc2_hsotg_enqueue_setup - start a request for EP0 packets |
5b7d70c6 BD |
1991 | * @hsotg: The device state. |
1992 | * | |
1993 | * Enqueue a request on EP0 if necessary to received any SETUP packets | |
1994 | * received from the host. | |
1995 | */ | |
1f91b4cc | 1996 | static void dwc2_hsotg_enqueue_setup(struct dwc2_hsotg *hsotg) |
5b7d70c6 BD |
1997 | { |
1998 | struct usb_request *req = hsotg->ctrl_req; | |
1f91b4cc | 1999 | struct dwc2_hsotg_req *hs_req = our_req(req); |
5b7d70c6 BD |
2000 | int ret; |
2001 | ||
2002 | dev_dbg(hsotg->dev, "%s: queueing setup request\n", __func__); | |
2003 | ||
2004 | req->zero = 0; | |
2005 | req->length = 8; | |
2006 | req->buf = hsotg->ctrl_buff; | |
1f91b4cc | 2007 | req->complete = dwc2_hsotg_complete_setup; |
5b7d70c6 BD |
2008 | |
2009 | if (!list_empty(&hs_req->queue)) { | |
2010 | dev_dbg(hsotg->dev, "%s already queued???\n", __func__); | |
2011 | return; | |
2012 | } | |
2013 | ||
c6f5c050 | 2014 | hsotg->eps_out[0]->dir_in = 0; |
8a20fa45 | 2015 | hsotg->eps_out[0]->send_zlp = 0; |
fe0b94ab | 2016 | hsotg->ep0_state = DWC2_EP0_SETUP; |
5b7d70c6 | 2017 | |
1f91b4cc | 2018 | ret = dwc2_hsotg_ep_queue(&hsotg->eps_out[0]->ep, req, GFP_ATOMIC); |
5b7d70c6 BD |
2019 | if (ret < 0) { |
2020 | dev_err(hsotg->dev, "%s: failed queue (%d)\n", __func__, ret); | |
8b9bc460 LM |
2021 | /* |
2022 | * Don't think there's much we can do other than watch the | |
2023 | * driver fail. | |
2024 | */ | |
5b7d70c6 BD |
2025 | } |
2026 | } | |
2027 | ||
1f91b4cc | 2028 | static void dwc2_hsotg_program_zlp(struct dwc2_hsotg *hsotg, |
9da51974 | 2029 | struct dwc2_hsotg_ep *hs_ep) |
fe0b94ab MYK |
2030 | { |
2031 | u32 ctrl; | |
2032 | u8 index = hs_ep->index; | |
2033 | u32 epctl_reg = hs_ep->dir_in ? DIEPCTL(index) : DOEPCTL(index); | |
2034 | u32 epsiz_reg = hs_ep->dir_in ? DIEPTSIZ(index) : DOEPTSIZ(index); | |
2035 | ||
ccb34a91 MYK |
2036 | if (hs_ep->dir_in) |
2037 | dev_dbg(hsotg->dev, "Sending zero-length packet on ep%d\n", | |
e02f9aa6 | 2038 | index); |
ccb34a91 MYK |
2039 | else |
2040 | dev_dbg(hsotg->dev, "Receiving zero-length packet on ep%d\n", | |
e02f9aa6 VA |
2041 | index); |
2042 | if (using_desc_dma(hsotg)) { | |
066cfd07 AP |
2043 | /* Not specific buffer needed for ep0 ZLP */ |
2044 | dma_addr_t dma = hs_ep->desc_list_dma; | |
2045 | ||
201ec568 MH |
2046 | if (!index) |
2047 | dwc2_gadget_set_ep0_desc_chain(hsotg, hs_ep); | |
2048 | ||
066cfd07 | 2049 | dwc2_gadget_config_nonisoc_xfer_ddma(hs_ep, dma, 0); |
e02f9aa6 | 2050 | } else { |
f25c42b8 GS |
2051 | dwc2_writel(hsotg, DXEPTSIZ_MC(1) | DXEPTSIZ_PKTCNT(1) | |
2052 | DXEPTSIZ_XFERSIZE(0), | |
e02f9aa6 VA |
2053 | epsiz_reg); |
2054 | } | |
fe0b94ab | 2055 | |
f25c42b8 | 2056 | ctrl = dwc2_readl(hsotg, epctl_reg); |
fe0b94ab MYK |
2057 | ctrl |= DXEPCTL_CNAK; /* clear NAK set by core */ |
2058 | ctrl |= DXEPCTL_EPENA; /* ensure ep enabled */ | |
2059 | ctrl |= DXEPCTL_USBACTEP; | |
f25c42b8 | 2060 | dwc2_writel(hsotg, ctrl, epctl_reg); |
fe0b94ab MYK |
2061 | } |
2062 | ||
5b7d70c6 | 2063 | /** |
1f91b4cc | 2064 | * dwc2_hsotg_complete_request - complete a request given to us |
5b7d70c6 BD |
2065 | * @hsotg: The device state. |
2066 | * @hs_ep: The endpoint the request was on. | |
2067 | * @hs_req: The request to complete. | |
2068 | * @result: The result code (0 => Ok, otherwise errno) | |
2069 | * | |
2070 | * The given request has finished, so call the necessary completion | |
2071 | * if it has one and then look to see if we can start a new request | |
2072 | * on the endpoint. | |
2073 | * | |
2074 | * Note, expects the ep to already be locked as appropriate. | |
8b9bc460 | 2075 | */ |
1f91b4cc | 2076 | static void dwc2_hsotg_complete_request(struct dwc2_hsotg *hsotg, |
9da51974 | 2077 | struct dwc2_hsotg_ep *hs_ep, |
1f91b4cc | 2078 | struct dwc2_hsotg_req *hs_req, |
5b7d70c6 BD |
2079 | int result) |
2080 | { | |
5b7d70c6 BD |
2081 | if (!hs_req) { |
2082 | dev_dbg(hsotg->dev, "%s: nothing to complete?\n", __func__); | |
2083 | return; | |
2084 | } | |
2085 | ||
2086 | dev_dbg(hsotg->dev, "complete: ep %p %s, req %p, %d => %p\n", | |
2087 | hs_ep, hs_ep->ep.name, hs_req, result, hs_req->req.complete); | |
2088 | ||
8b9bc460 LM |
2089 | /* |
2090 | * only replace the status if we've not already set an error | |
2091 | * from a previous transaction | |
2092 | */ | |
5b7d70c6 BD |
2093 | |
2094 | if (hs_req->req.status == -EINPROGRESS) | |
2095 | hs_req->req.status = result; | |
2096 | ||
44583fec YL |
2097 | if (using_dma(hsotg)) |
2098 | dwc2_hsotg_unmap_dma(hsotg, hs_ep, hs_req); | |
2099 | ||
1f91b4cc | 2100 | dwc2_hsotg_handle_unaligned_buf_complete(hsotg, hs_ep, hs_req); |
7d24c1b5 | 2101 | |
5b7d70c6 BD |
2102 | hs_ep->req = NULL; |
2103 | list_del_init(&hs_req->queue); | |
2104 | ||
8b9bc460 LM |
2105 | /* |
2106 | * call the complete request with the locks off, just in case the | |
2107 | * request tries to queue more work for this endpoint. | |
2108 | */ | |
5b7d70c6 BD |
2109 | |
2110 | if (hs_req->req.complete) { | |
22258f49 | 2111 | spin_unlock(&hsotg->lock); |
304f7e5e | 2112 | usb_gadget_giveback_request(&hs_ep->ep, &hs_req->req); |
22258f49 | 2113 | spin_lock(&hsotg->lock); |
5b7d70c6 BD |
2114 | } |
2115 | ||
540ccba0 VA |
2116 | /* In DDMA don't need to proceed to starting of next ISOC request */ |
2117 | if (using_desc_dma(hsotg) && hs_ep->isochronous) | |
2118 | return; | |
2119 | ||
8b9bc460 LM |
2120 | /* |
2121 | * Look to see if there is anything else to do. Note, the completion | |
5b7d70c6 | 2122 | * of the previous request may have caused a new request to be started |
8b9bc460 LM |
2123 | * so be careful when doing this. |
2124 | */ | |
5b7d70c6 | 2125 | |
34c0887f | 2126 | if (!hs_ep->req && result >= 0) |
41cc4cd2 | 2127 | dwc2_gadget_start_next_request(hs_ep); |
5b7d70c6 BD |
2128 | } |
2129 | ||
540ccba0 VA |
2130 | /* |
2131 | * dwc2_gadget_complete_isoc_request_ddma - complete an isoc request in DDMA | |
2132 | * @hs_ep: The endpoint the request was on. | |
2133 | * | |
2134 | * Get first request from the ep queue, determine descriptor on which complete | |
729cac69 MH |
2135 | * happened. SW discovers which descriptor currently in use by HW, adjusts |
2136 | * dma_address and calculates index of completed descriptor based on the value | |
2137 | * of DEPDMA register. Update actual length of request, giveback to gadget. | |
540ccba0 VA |
2138 | */ |
2139 | static void dwc2_gadget_complete_isoc_request_ddma(struct dwc2_hsotg_ep *hs_ep) | |
2140 | { | |
2141 | struct dwc2_hsotg *hsotg = hs_ep->parent; | |
2142 | struct dwc2_hsotg_req *hs_req; | |
2143 | struct usb_request *ureq; | |
540ccba0 VA |
2144 | u32 desc_sts; |
2145 | u32 mask; | |
2146 | ||
729cac69 | 2147 | desc_sts = hs_ep->desc_list[hs_ep->compl_desc].status; |
540ccba0 | 2148 | |
729cac69 MH |
2149 | /* Process only descriptors with buffer status set to DMA done */ |
2150 | while ((desc_sts & DEV_DMA_BUFF_STS_MASK) >> | |
2151 | DEV_DMA_BUFF_STS_SHIFT == DEV_DMA_BUFF_STS_DMADONE) { | |
540ccba0 | 2152 | |
729cac69 MH |
2153 | hs_req = get_ep_head(hs_ep); |
2154 | if (!hs_req) { | |
2155 | dev_warn(hsotg->dev, "%s: ISOC EP queue empty\n", __func__); | |
2156 | return; | |
2157 | } | |
2158 | ureq = &hs_req->req; | |
2159 | ||
2160 | /* Check completion status */ | |
2161 | if ((desc_sts & DEV_DMA_STS_MASK) >> DEV_DMA_STS_SHIFT == | |
2162 | DEV_DMA_STS_SUCC) { | |
2163 | mask = hs_ep->dir_in ? DEV_DMA_ISOC_TX_NBYTES_MASK : | |
2164 | DEV_DMA_ISOC_RX_NBYTES_MASK; | |
2165 | ureq->actual = ureq->length - ((desc_sts & mask) >> | |
2166 | DEV_DMA_ISOC_NBYTES_SHIFT); | |
2167 | ||
2168 | /* Adjust actual len for ISOC Out if len is | |
2169 | * not align of 4 | |
2170 | */ | |
2171 | if (!hs_ep->dir_in && ureq->length & 0x3) | |
2172 | ureq->actual += 4 - (ureq->length & 0x3); | |
c8006f67 MH |
2173 | |
2174 | /* Set actual frame number for completed transfers */ | |
2175 | ureq->frame_number = | |
2176 | (desc_sts & DEV_DMA_ISOC_FRNUM_MASK) >> | |
2177 | DEV_DMA_ISOC_FRNUM_SHIFT; | |
729cac69 | 2178 | } |
540ccba0 | 2179 | |
729cac69 | 2180 | dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); |
95d2b037 | 2181 | |
729cac69 | 2182 | hs_ep->compl_desc++; |
54f37f56 | 2183 | if (hs_ep->compl_desc > (MAX_DMA_DESC_NUM_HS_ISOC - 1)) |
729cac69 MH |
2184 | hs_ep->compl_desc = 0; |
2185 | desc_sts = hs_ep->desc_list[hs_ep->compl_desc].status; | |
2186 | } | |
540ccba0 VA |
2187 | } |
2188 | ||
2189 | /* | |
729cac69 MH |
2190 | * dwc2_gadget_handle_isoc_bna - handle BNA interrupt for ISOC. |
2191 | * @hs_ep: The isochronous endpoint. | |
540ccba0 | 2192 | * |
729cac69 MH |
2193 | * If EP ISOC OUT then need to flush RX FIFO to remove source of BNA |
2194 | * interrupt. Reset target frame and next_desc to allow to start | |
2195 | * ISOC's on NAK interrupt for IN direction or on OUTTKNEPDIS | |
2196 | * interrupt for OUT direction. | |
540ccba0 | 2197 | */ |
729cac69 | 2198 | static void dwc2_gadget_handle_isoc_bna(struct dwc2_hsotg_ep *hs_ep) |
540ccba0 VA |
2199 | { |
2200 | struct dwc2_hsotg *hsotg = hs_ep->parent; | |
540ccba0 | 2201 | |
729cac69 MH |
2202 | if (!hs_ep->dir_in) |
2203 | dwc2_flush_rx_fifo(hsotg); | |
2204 | dwc2_hsotg_complete_request(hsotg, hs_ep, get_ep_head(hs_ep), 0); | |
540ccba0 | 2205 | |
729cac69 MH |
2206 | hs_ep->target_frame = TARGET_FRAME_INITIAL; |
2207 | hs_ep->next_desc = 0; | |
2208 | hs_ep->compl_desc = 0; | |
540ccba0 VA |
2209 | } |
2210 | ||
5b7d70c6 | 2211 | /** |
1f91b4cc | 2212 | * dwc2_hsotg_rx_data - receive data from the FIFO for an endpoint |
5b7d70c6 BD |
2213 | * @hsotg: The device state. |
2214 | * @ep_idx: The endpoint index for the data | |
2215 | * @size: The size of data in the fifo, in bytes | |
2216 | * | |
2217 | * The FIFO status shows there is data to read from the FIFO for a given | |
2218 | * endpoint, so sort out whether we need to read the data into a request | |
2219 | * that has been made for that endpoint. | |
2220 | */ | |
1f91b4cc | 2221 | static void dwc2_hsotg_rx_data(struct dwc2_hsotg *hsotg, int ep_idx, int size) |
5b7d70c6 | 2222 | { |
1f91b4cc FB |
2223 | struct dwc2_hsotg_ep *hs_ep = hsotg->eps_out[ep_idx]; |
2224 | struct dwc2_hsotg_req *hs_req = hs_ep->req; | |
5b7d70c6 BD |
2225 | int to_read; |
2226 | int max_req; | |
2227 | int read_ptr; | |
2228 | ||
2229 | if (!hs_req) { | |
f25c42b8 | 2230 | u32 epctl = dwc2_readl(hsotg, DOEPCTL(ep_idx)); |
5b7d70c6 BD |
2231 | int ptr; |
2232 | ||
6b448af4 | 2233 | dev_dbg(hsotg->dev, |
9da51974 | 2234 | "%s: FIFO %d bytes on ep%d but no req (DXEPCTl=0x%08x)\n", |
5b7d70c6 BD |
2235 | __func__, size, ep_idx, epctl); |
2236 | ||
2237 | /* dump the data from the FIFO, we've nothing we can do */ | |
2238 | for (ptr = 0; ptr < size; ptr += 4) | |
f25c42b8 | 2239 | (void)dwc2_readl(hsotg, EPFIFO(ep_idx)); |
5b7d70c6 BD |
2240 | |
2241 | return; | |
2242 | } | |
2243 | ||
5b7d70c6 BD |
2244 | to_read = size; |
2245 | read_ptr = hs_req->req.actual; | |
2246 | max_req = hs_req->req.length - read_ptr; | |
2247 | ||
a33e7136 BD |
2248 | dev_dbg(hsotg->dev, "%s: read %d/%d, done %d/%d\n", |
2249 | __func__, to_read, max_req, read_ptr, hs_req->req.length); | |
2250 | ||
5b7d70c6 | 2251 | if (to_read > max_req) { |
8b9bc460 LM |
2252 | /* |
2253 | * more data appeared than we where willing | |
5b7d70c6 BD |
2254 | * to deal with in this request. |
2255 | */ | |
2256 | ||
2257 | /* currently we don't deal this */ | |
2258 | WARN_ON_ONCE(1); | |
2259 | } | |
2260 | ||
5b7d70c6 BD |
2261 | hs_ep->total_data += to_read; |
2262 | hs_req->req.actual += to_read; | |
2263 | to_read = DIV_ROUND_UP(to_read, 4); | |
2264 | ||
8b9bc460 LM |
2265 | /* |
2266 | * note, we might over-write the buffer end by 3 bytes depending on | |
2267 | * alignment of the data. | |
2268 | */ | |
342ccce1 GS |
2269 | dwc2_readl_rep(hsotg, EPFIFO(ep_idx), |
2270 | hs_req->req.buf + read_ptr, to_read); | |
5b7d70c6 BD |
2271 | } |
2272 | ||
2273 | /** | |
1f91b4cc | 2274 | * dwc2_hsotg_ep0_zlp - send/receive zero-length packet on control endpoint |
5b7d70c6 | 2275 | * @hsotg: The device instance |
fe0b94ab | 2276 | * @dir_in: If IN zlp |
5b7d70c6 BD |
2277 | * |
2278 | * Generate a zero-length IN packet request for terminating a SETUP | |
2279 | * transaction. | |
2280 | * | |
2281 | * Note, since we don't write any data to the TxFIFO, then it is | |
25985edc | 2282 | * currently believed that we do not need to wait for any space in |
5b7d70c6 BD |
2283 | * the TxFIFO. |
2284 | */ | |
1f91b4cc | 2285 | static void dwc2_hsotg_ep0_zlp(struct dwc2_hsotg *hsotg, bool dir_in) |
5b7d70c6 | 2286 | { |
c6f5c050 | 2287 | /* eps_out[0] is used in both directions */ |
fe0b94ab MYK |
2288 | hsotg->eps_out[0]->dir_in = dir_in; |
2289 | hsotg->ep0_state = dir_in ? DWC2_EP0_STATUS_IN : DWC2_EP0_STATUS_OUT; | |
5b7d70c6 | 2290 | |
1f91b4cc | 2291 | dwc2_hsotg_program_zlp(hsotg, hsotg->eps_out[0]); |
5b7d70c6 BD |
2292 | } |
2293 | ||
ec1f9d9f | 2294 | static void dwc2_hsotg_change_ep_iso_parity(struct dwc2_hsotg *hsotg, |
9da51974 | 2295 | u32 epctl_reg) |
ec1f9d9f RB |
2296 | { |
2297 | u32 ctrl; | |
2298 | ||
f25c42b8 | 2299 | ctrl = dwc2_readl(hsotg, epctl_reg); |
ec1f9d9f RB |
2300 | if (ctrl & DXEPCTL_EOFRNUM) |
2301 | ctrl |= DXEPCTL_SETEVENFR; | |
2302 | else | |
2303 | ctrl |= DXEPCTL_SETODDFR; | |
f25c42b8 | 2304 | dwc2_writel(hsotg, ctrl, epctl_reg); |
ec1f9d9f RB |
2305 | } |
2306 | ||
aa3e8bc8 VA |
2307 | /* |
2308 | * dwc2_gadget_get_xfersize_ddma - get transferred bytes amount from desc | |
2309 | * @hs_ep - The endpoint on which transfer went | |
2310 | * | |
2311 | * Iterate over endpoints descriptor chain and get info on bytes remained | |
2312 | * in DMA descriptors after transfer has completed. Used for non isoc EPs. | |
2313 | */ | |
2314 | static unsigned int dwc2_gadget_get_xfersize_ddma(struct dwc2_hsotg_ep *hs_ep) | |
2315 | { | |
2316 | struct dwc2_hsotg *hsotg = hs_ep->parent; | |
2317 | unsigned int bytes_rem = 0; | |
2318 | struct dwc2_dma_desc *desc = hs_ep->desc_list; | |
2319 | int i; | |
2320 | u32 status; | |
2321 | ||
2322 | if (!desc) | |
2323 | return -EINVAL; | |
2324 | ||
2325 | for (i = 0; i < hs_ep->desc_count; ++i) { | |
2326 | status = desc->status; | |
2327 | bytes_rem += status & DEV_DMA_NBYTES_MASK; | |
2328 | ||
2329 | if (status & DEV_DMA_STS_MASK) | |
2330 | dev_err(hsotg->dev, "descriptor %d closed with %x\n", | |
2331 | i, status & DEV_DMA_STS_MASK); | |
5acb4b97 | 2332 | desc++; |
aa3e8bc8 VA |
2333 | } |
2334 | ||
2335 | return bytes_rem; | |
2336 | } | |
2337 | ||
5b7d70c6 | 2338 | /** |
1f91b4cc | 2339 | * dwc2_hsotg_handle_outdone - handle receiving OutDone/SetupDone from RXFIFO |
5b7d70c6 BD |
2340 | * @hsotg: The device instance |
2341 | * @epnum: The endpoint received from | |
5b7d70c6 BD |
2342 | * |
2343 | * The RXFIFO has delivered an OutDone event, which means that the data | |
2344 | * transfer for an OUT endpoint has been completed, either by a short | |
2345 | * packet or by the finish of a transfer. | |
8b9bc460 | 2346 | */ |
1f91b4cc | 2347 | static void dwc2_hsotg_handle_outdone(struct dwc2_hsotg *hsotg, int epnum) |
5b7d70c6 | 2348 | { |
f25c42b8 | 2349 | u32 epsize = dwc2_readl(hsotg, DOEPTSIZ(epnum)); |
1f91b4cc FB |
2350 | struct dwc2_hsotg_ep *hs_ep = hsotg->eps_out[epnum]; |
2351 | struct dwc2_hsotg_req *hs_req = hs_ep->req; | |
5b7d70c6 | 2352 | struct usb_request *req = &hs_req->req; |
9da51974 | 2353 | unsigned int size_left = DXEPTSIZ_XFERSIZE_GET(epsize); |
5b7d70c6 BD |
2354 | int result = 0; |
2355 | ||
2356 | if (!hs_req) { | |
2357 | dev_dbg(hsotg->dev, "%s: no request active\n", __func__); | |
2358 | return; | |
2359 | } | |
2360 | ||
fe0b94ab MYK |
2361 | if (epnum == 0 && hsotg->ep0_state == DWC2_EP0_STATUS_OUT) { |
2362 | dev_dbg(hsotg->dev, "zlp packet received\n"); | |
1f91b4cc FB |
2363 | dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); |
2364 | dwc2_hsotg_enqueue_setup(hsotg); | |
fe0b94ab MYK |
2365 | return; |
2366 | } | |
2367 | ||
aa3e8bc8 VA |
2368 | if (using_desc_dma(hsotg)) |
2369 | size_left = dwc2_gadget_get_xfersize_ddma(hs_ep); | |
2370 | ||
5b7d70c6 | 2371 | if (using_dma(hsotg)) { |
9da51974 | 2372 | unsigned int size_done; |
5b7d70c6 | 2373 | |
8b9bc460 LM |
2374 | /* |
2375 | * Calculate the size of the transfer by checking how much | |
5b7d70c6 BD |
2376 | * is left in the endpoint size register and then working it |
2377 | * out from the amount we loaded for the transfer. | |
2378 | * | |
2379 | * We need to do this as DMA pointers are always 32bit aligned | |
2380 | * so may overshoot/undershoot the transfer. | |
2381 | */ | |
2382 | ||
5b7d70c6 BD |
2383 | size_done = hs_ep->size_loaded - size_left; |
2384 | size_done += hs_ep->last_load; | |
2385 | ||
2386 | req->actual = size_done; | |
2387 | } | |
2388 | ||
a33e7136 BD |
2389 | /* if there is more request to do, schedule new transfer */ |
2390 | if (req->actual < req->length && size_left == 0) { | |
1f91b4cc | 2391 | dwc2_hsotg_start_req(hsotg, hs_ep, hs_req, true); |
a33e7136 BD |
2392 | return; |
2393 | } | |
2394 | ||
5b7d70c6 BD |
2395 | if (req->actual < req->length && req->short_not_ok) { |
2396 | dev_dbg(hsotg->dev, "%s: got %d/%d (short not ok) => error\n", | |
2397 | __func__, req->actual, req->length); | |
2398 | ||
8b9bc460 LM |
2399 | /* |
2400 | * todo - what should we return here? there's no one else | |
2401 | * even bothering to check the status. | |
2402 | */ | |
5b7d70c6 BD |
2403 | } |
2404 | ||
ef750c71 VA |
2405 | /* DDMA IN status phase will start from StsPhseRcvd interrupt */ |
2406 | if (!using_desc_dma(hsotg) && epnum == 0 && | |
2407 | hsotg->ep0_state == DWC2_EP0_DATA_OUT) { | |
fe0b94ab | 2408 | /* Move to STATUS IN */ |
b4c53b4a MH |
2409 | if (!hsotg->delayed_status) |
2410 | dwc2_hsotg_ep0_zlp(hsotg, true); | |
5b7d70c6 BD |
2411 | } |
2412 | ||
ec1f9d9f RB |
2413 | /* |
2414 | * Slave mode OUT transfers do not go through XferComplete so | |
2415 | * adjust the ISOC parity here. | |
2416 | */ | |
2417 | if (!using_dma(hsotg)) { | |
ec1f9d9f RB |
2418 | if (hs_ep->isochronous && hs_ep->interval == 1) |
2419 | dwc2_hsotg_change_ep_iso_parity(hsotg, DOEPCTL(epnum)); | |
837e9f00 VM |
2420 | else if (hs_ep->isochronous && hs_ep->interval > 1) |
2421 | dwc2_gadget_incr_frame_num(hs_ep); | |
ec1f9d9f RB |
2422 | } |
2423 | ||
4faf3b36 MH |
2424 | /* Set actual frame number for completed transfers */ |
2425 | if (!using_desc_dma(hsotg) && hs_ep->isochronous) | |
2426 | req->frame_number = hsotg->frame_number; | |
2427 | ||
1f91b4cc | 2428 | dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, result); |
5b7d70c6 BD |
2429 | } |
2430 | ||
5b7d70c6 | 2431 | /** |
1f91b4cc | 2432 | * dwc2_hsotg_handle_rx - RX FIFO has data |
5b7d70c6 BD |
2433 | * @hsotg: The device instance |
2434 | * | |
2435 | * The IRQ handler has detected that the RX FIFO has some data in it | |
2436 | * that requires processing, so find out what is in there and do the | |
2437 | * appropriate read. | |
2438 | * | |
25985edc | 2439 | * The RXFIFO is a true FIFO, the packets coming out are still in packet |
5b7d70c6 BD |
2440 | * chunks, so if you have x packets received on an endpoint you'll get x |
2441 | * FIFO events delivered, each with a packet's worth of data in it. | |
2442 | * | |
2443 | * When using DMA, we should not be processing events from the RXFIFO | |
2444 | * as the actual data should be sent to the memory directly and we turn | |
2445 | * on the completion interrupts to get notifications of transfer completion. | |
2446 | */ | |
1f91b4cc | 2447 | static void dwc2_hsotg_handle_rx(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 2448 | { |
f25c42b8 | 2449 | u32 grxstsr = dwc2_readl(hsotg, GRXSTSP); |
5b7d70c6 BD |
2450 | u32 epnum, status, size; |
2451 | ||
2452 | WARN_ON(using_dma(hsotg)); | |
2453 | ||
47a1685f DN |
2454 | epnum = grxstsr & GRXSTS_EPNUM_MASK; |
2455 | status = grxstsr & GRXSTS_PKTSTS_MASK; | |
5b7d70c6 | 2456 | |
47a1685f DN |
2457 | size = grxstsr & GRXSTS_BYTECNT_MASK; |
2458 | size >>= GRXSTS_BYTECNT_SHIFT; | |
5b7d70c6 | 2459 | |
d7c747c5 | 2460 | dev_dbg(hsotg->dev, "%s: GRXSTSP=0x%08x (%d@%d)\n", |
9da51974 | 2461 | __func__, grxstsr, size, epnum); |
5b7d70c6 | 2462 | |
47a1685f DN |
2463 | switch ((status & GRXSTS_PKTSTS_MASK) >> GRXSTS_PKTSTS_SHIFT) { |
2464 | case GRXSTS_PKTSTS_GLOBALOUTNAK: | |
2465 | dev_dbg(hsotg->dev, "GLOBALOUTNAK\n"); | |
5b7d70c6 BD |
2466 | break; |
2467 | ||
47a1685f | 2468 | case GRXSTS_PKTSTS_OUTDONE: |
5b7d70c6 | 2469 | dev_dbg(hsotg->dev, "OutDone (Frame=0x%08x)\n", |
1f91b4cc | 2470 | dwc2_hsotg_read_frameno(hsotg)); |
5b7d70c6 BD |
2471 | |
2472 | if (!using_dma(hsotg)) | |
1f91b4cc | 2473 | dwc2_hsotg_handle_outdone(hsotg, epnum); |
5b7d70c6 BD |
2474 | break; |
2475 | ||
47a1685f | 2476 | case GRXSTS_PKTSTS_SETUPDONE: |
5b7d70c6 BD |
2477 | dev_dbg(hsotg->dev, |
2478 | "SetupDone (Frame=0x%08x, DOPEPCTL=0x%08x)\n", | |
1f91b4cc | 2479 | dwc2_hsotg_read_frameno(hsotg), |
f25c42b8 | 2480 | dwc2_readl(hsotg, DOEPCTL(0))); |
fe0b94ab | 2481 | /* |
1f91b4cc | 2482 | * Call dwc2_hsotg_handle_outdone here if it was not called from |
fe0b94ab MYK |
2483 | * GRXSTS_PKTSTS_OUTDONE. That is, if the core didn't |
2484 | * generate GRXSTS_PKTSTS_OUTDONE for setup packet. | |
2485 | */ | |
2486 | if (hsotg->ep0_state == DWC2_EP0_SETUP) | |
1f91b4cc | 2487 | dwc2_hsotg_handle_outdone(hsotg, epnum); |
5b7d70c6 BD |
2488 | break; |
2489 | ||
47a1685f | 2490 | case GRXSTS_PKTSTS_OUTRX: |
1f91b4cc | 2491 | dwc2_hsotg_rx_data(hsotg, epnum, size); |
5b7d70c6 BD |
2492 | break; |
2493 | ||
47a1685f | 2494 | case GRXSTS_PKTSTS_SETUPRX: |
5b7d70c6 BD |
2495 | dev_dbg(hsotg->dev, |
2496 | "SetupRX (Frame=0x%08x, DOPEPCTL=0x%08x)\n", | |
1f91b4cc | 2497 | dwc2_hsotg_read_frameno(hsotg), |
f25c42b8 | 2498 | dwc2_readl(hsotg, DOEPCTL(0))); |
5b7d70c6 | 2499 | |
fe0b94ab MYK |
2500 | WARN_ON(hsotg->ep0_state != DWC2_EP0_SETUP); |
2501 | ||
1f91b4cc | 2502 | dwc2_hsotg_rx_data(hsotg, epnum, size); |
5b7d70c6 BD |
2503 | break; |
2504 | ||
2505 | default: | |
2506 | dev_warn(hsotg->dev, "%s: unknown status %08x\n", | |
2507 | __func__, grxstsr); | |
2508 | ||
1f91b4cc | 2509 | dwc2_hsotg_dump(hsotg); |
5b7d70c6 BD |
2510 | break; |
2511 | } | |
2512 | } | |
2513 | ||
2514 | /** | |
1f91b4cc | 2515 | * dwc2_hsotg_ep0_mps - turn max packet size into register setting |
5b7d70c6 | 2516 | * @mps: The maximum packet size in bytes. |
8b9bc460 | 2517 | */ |
1f91b4cc | 2518 | static u32 dwc2_hsotg_ep0_mps(unsigned int mps) |
5b7d70c6 BD |
2519 | { |
2520 | switch (mps) { | |
2521 | case 64: | |
94cb8fd6 | 2522 | return D0EPCTL_MPS_64; |
5b7d70c6 | 2523 | case 32: |
94cb8fd6 | 2524 | return D0EPCTL_MPS_32; |
5b7d70c6 | 2525 | case 16: |
94cb8fd6 | 2526 | return D0EPCTL_MPS_16; |
5b7d70c6 | 2527 | case 8: |
94cb8fd6 | 2528 | return D0EPCTL_MPS_8; |
5b7d70c6 BD |
2529 | } |
2530 | ||
2531 | /* bad max packet size, warn and return invalid result */ | |
2532 | WARN_ON(1); | |
2533 | return (u32)-1; | |
2534 | } | |
2535 | ||
2536 | /** | |
1f91b4cc | 2537 | * dwc2_hsotg_set_ep_maxpacket - set endpoint's max-packet field |
5b7d70c6 BD |
2538 | * @hsotg: The driver state. |
2539 | * @ep: The index number of the endpoint | |
2540 | * @mps: The maximum packet size in bytes | |
ee2c40de | 2541 | * @mc: The multicount value |
6fb914d7 | 2542 | * @dir_in: True if direction is in. |
5b7d70c6 BD |
2543 | * |
2544 | * Configure the maximum packet size for the given endpoint, updating | |
2545 | * the hardware control registers to reflect this. | |
2546 | */ | |
1f91b4cc | 2547 | static void dwc2_hsotg_set_ep_maxpacket(struct dwc2_hsotg *hsotg, |
ee2c40de VM |
2548 | unsigned int ep, unsigned int mps, |
2549 | unsigned int mc, unsigned int dir_in) | |
5b7d70c6 | 2550 | { |
1f91b4cc | 2551 | struct dwc2_hsotg_ep *hs_ep; |
5b7d70c6 BD |
2552 | u32 reg; |
2553 | ||
c6f5c050 MYK |
2554 | hs_ep = index_to_ep(hsotg, ep, dir_in); |
2555 | if (!hs_ep) | |
2556 | return; | |
2557 | ||
5b7d70c6 | 2558 | if (ep == 0) { |
ee2c40de VM |
2559 | u32 mps_bytes = mps; |
2560 | ||
5b7d70c6 | 2561 | /* EP0 is a special case */ |
ee2c40de VM |
2562 | mps = dwc2_hsotg_ep0_mps(mps_bytes); |
2563 | if (mps > 3) | |
5b7d70c6 | 2564 | goto bad_mps; |
ee2c40de | 2565 | hs_ep->ep.maxpacket = mps_bytes; |
4fca54aa | 2566 | hs_ep->mc = 1; |
5b7d70c6 | 2567 | } else { |
ee2c40de | 2568 | if (mps > 1024) |
5b7d70c6 | 2569 | goto bad_mps; |
ee2c40de VM |
2570 | hs_ep->mc = mc; |
2571 | if (mc > 3) | |
4fca54aa | 2572 | goto bad_mps; |
ee2c40de | 2573 | hs_ep->ep.maxpacket = mps; |
5b7d70c6 BD |
2574 | } |
2575 | ||
c6f5c050 | 2576 | if (dir_in) { |
f25c42b8 | 2577 | reg = dwc2_readl(hsotg, DIEPCTL(ep)); |
c6f5c050 | 2578 | reg &= ~DXEPCTL_MPS_MASK; |
ee2c40de | 2579 | reg |= mps; |
f25c42b8 | 2580 | dwc2_writel(hsotg, reg, DIEPCTL(ep)); |
c6f5c050 | 2581 | } else { |
f25c42b8 | 2582 | reg = dwc2_readl(hsotg, DOEPCTL(ep)); |
47a1685f | 2583 | reg &= ~DXEPCTL_MPS_MASK; |
ee2c40de | 2584 | reg |= mps; |
f25c42b8 | 2585 | dwc2_writel(hsotg, reg, DOEPCTL(ep)); |
659ad60c | 2586 | } |
5b7d70c6 BD |
2587 | |
2588 | return; | |
2589 | ||
2590 | bad_mps: | |
2591 | dev_err(hsotg->dev, "ep%d: bad mps of %d\n", ep, mps); | |
2592 | } | |
2593 | ||
9c39ddc6 | 2594 | /** |
1f91b4cc | 2595 | * dwc2_hsotg_txfifo_flush - flush Tx FIFO |
9c39ddc6 AT |
2596 | * @hsotg: The driver state |
2597 | * @idx: The index for the endpoint (0..15) | |
2598 | */ | |
1f91b4cc | 2599 | static void dwc2_hsotg_txfifo_flush(struct dwc2_hsotg *hsotg, unsigned int idx) |
9c39ddc6 | 2600 | { |
f25c42b8 GS |
2601 | dwc2_writel(hsotg, GRSTCTL_TXFNUM(idx) | GRSTCTL_TXFFLSH, |
2602 | GRSTCTL); | |
9c39ddc6 AT |
2603 | |
2604 | /* wait until the fifo is flushed */ | |
79d6b8c5 SA |
2605 | if (dwc2_hsotg_wait_bit_clear(hsotg, GRSTCTL, GRSTCTL_TXFFLSH, 100)) |
2606 | dev_warn(hsotg->dev, "%s: timeout flushing fifo GRSTCTL_TXFFLSH\n", | |
2607 | __func__); | |
9c39ddc6 | 2608 | } |
5b7d70c6 BD |
2609 | |
2610 | /** | |
1f91b4cc | 2611 | * dwc2_hsotg_trytx - check to see if anything needs transmitting |
5b7d70c6 BD |
2612 | * @hsotg: The driver state |
2613 | * @hs_ep: The driver endpoint to check. | |
2614 | * | |
2615 | * Check to see if there is a request that has data to send, and if so | |
2616 | * make an attempt to write data into the FIFO. | |
2617 | */ | |
1f91b4cc | 2618 | static int dwc2_hsotg_trytx(struct dwc2_hsotg *hsotg, |
9da51974 | 2619 | struct dwc2_hsotg_ep *hs_ep) |
5b7d70c6 | 2620 | { |
1f91b4cc | 2621 | struct dwc2_hsotg_req *hs_req = hs_ep->req; |
5b7d70c6 | 2622 | |
afcf4169 RB |
2623 | if (!hs_ep->dir_in || !hs_req) { |
2624 | /** | |
2625 | * if request is not enqueued, we disable interrupts | |
2626 | * for endpoints, excepting ep0 | |
2627 | */ | |
2628 | if (hs_ep->index != 0) | |
1f91b4cc | 2629 | dwc2_hsotg_ctrl_epint(hsotg, hs_ep->index, |
9da51974 | 2630 | hs_ep->dir_in, 0); |
5b7d70c6 | 2631 | return 0; |
afcf4169 | 2632 | } |
5b7d70c6 BD |
2633 | |
2634 | if (hs_req->req.actual < hs_req->req.length) { | |
2635 | dev_dbg(hsotg->dev, "trying to write more for ep%d\n", | |
2636 | hs_ep->index); | |
1f91b4cc | 2637 | return dwc2_hsotg_write_fifo(hsotg, hs_ep, hs_req); |
5b7d70c6 BD |
2638 | } |
2639 | ||
2640 | return 0; | |
2641 | } | |
2642 | ||
2643 | /** | |
1f91b4cc | 2644 | * dwc2_hsotg_complete_in - complete IN transfer |
5b7d70c6 BD |
2645 | * @hsotg: The device state. |
2646 | * @hs_ep: The endpoint that has just completed. | |
2647 | * | |
2648 | * An IN transfer has been completed, update the transfer's state and then | |
2649 | * call the relevant completion routines. | |
2650 | */ | |
1f91b4cc | 2651 | static void dwc2_hsotg_complete_in(struct dwc2_hsotg *hsotg, |
9da51974 | 2652 | struct dwc2_hsotg_ep *hs_ep) |
5b7d70c6 | 2653 | { |
1f91b4cc | 2654 | struct dwc2_hsotg_req *hs_req = hs_ep->req; |
f25c42b8 | 2655 | u32 epsize = dwc2_readl(hsotg, DIEPTSIZ(hs_ep->index)); |
5b7d70c6 BD |
2656 | int size_left, size_done; |
2657 | ||
2658 | if (!hs_req) { | |
2659 | dev_dbg(hsotg->dev, "XferCompl but no req\n"); | |
2660 | return; | |
2661 | } | |
2662 | ||
d3ca0259 | 2663 | /* Finish ZLP handling for IN EP0 transactions */ |
fe0b94ab MYK |
2664 | if (hs_ep->index == 0 && hsotg->ep0_state == DWC2_EP0_STATUS_IN) { |
2665 | dev_dbg(hsotg->dev, "zlp packet sent\n"); | |
c3b22fe2 RK |
2666 | |
2667 | /* | |
2668 | * While send zlp for DWC2_EP0_STATUS_IN EP direction was | |
2669 | * changed to IN. Change back to complete OUT transfer request | |
2670 | */ | |
2671 | hs_ep->dir_in = 0; | |
2672 | ||
1f91b4cc | 2673 | dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); |
9e14d0a5 GH |
2674 | if (hsotg->test_mode) { |
2675 | int ret; | |
2676 | ||
1f91b4cc | 2677 | ret = dwc2_hsotg_set_test_mode(hsotg, hsotg->test_mode); |
9e14d0a5 GH |
2678 | if (ret < 0) { |
2679 | dev_dbg(hsotg->dev, "Invalid Test #%d\n", | |
9da51974 | 2680 | hsotg->test_mode); |
1f91b4cc | 2681 | dwc2_hsotg_stall_ep0(hsotg); |
9e14d0a5 GH |
2682 | return; |
2683 | } | |
2684 | } | |
1f91b4cc | 2685 | dwc2_hsotg_enqueue_setup(hsotg); |
d3ca0259 LM |
2686 | return; |
2687 | } | |
2688 | ||
8b9bc460 LM |
2689 | /* |
2690 | * Calculate the size of the transfer by checking how much is left | |
5b7d70c6 BD |
2691 | * in the endpoint size register and then working it out from |
2692 | * the amount we loaded for the transfer. | |
2693 | * | |
2694 | * We do this even for DMA, as the transfer may have incremented | |
2695 | * past the end of the buffer (DMA transfers are always 32bit | |
2696 | * aligned). | |
2697 | */ | |
aa3e8bc8 VA |
2698 | if (using_desc_dma(hsotg)) { |
2699 | size_left = dwc2_gadget_get_xfersize_ddma(hs_ep); | |
2700 | if (size_left < 0) | |
2701 | dev_err(hsotg->dev, "error parsing DDMA results %d\n", | |
2702 | size_left); | |
2703 | } else { | |
2704 | size_left = DXEPTSIZ_XFERSIZE_GET(epsize); | |
2705 | } | |
5b7d70c6 BD |
2706 | |
2707 | size_done = hs_ep->size_loaded - size_left; | |
2708 | size_done += hs_ep->last_load; | |
2709 | ||
2710 | if (hs_req->req.actual != size_done) | |
2711 | dev_dbg(hsotg->dev, "%s: adjusting size done %d => %d\n", | |
2712 | __func__, hs_req->req.actual, size_done); | |
2713 | ||
2714 | hs_req->req.actual = size_done; | |
d3ca0259 LM |
2715 | dev_dbg(hsotg->dev, "req->length:%d req->actual:%d req->zero:%d\n", |
2716 | hs_req->req.length, hs_req->req.actual, hs_req->req.zero); | |
2717 | ||
5b7d70c6 BD |
2718 | if (!size_left && hs_req->req.actual < hs_req->req.length) { |
2719 | dev_dbg(hsotg->dev, "%s trying more for req...\n", __func__); | |
1f91b4cc | 2720 | dwc2_hsotg_start_req(hsotg, hs_ep, hs_req, true); |
fe0b94ab MYK |
2721 | return; |
2722 | } | |
2723 | ||
f71b5e25 | 2724 | /* Zlp for all endpoints, for ep0 only in DATA IN stage */ |
8a20fa45 | 2725 | if (hs_ep->send_zlp) { |
1f91b4cc | 2726 | dwc2_hsotg_program_zlp(hsotg, hs_ep); |
8a20fa45 | 2727 | hs_ep->send_zlp = 0; |
f71b5e25 MYK |
2728 | /* transfer will be completed on next complete interrupt */ |
2729 | return; | |
2730 | } | |
2731 | ||
fe0b94ab MYK |
2732 | if (hs_ep->index == 0 && hsotg->ep0_state == DWC2_EP0_DATA_IN) { |
2733 | /* Move to STATUS OUT */ | |
1f91b4cc | 2734 | dwc2_hsotg_ep0_zlp(hsotg, false); |
fe0b94ab MYK |
2735 | return; |
2736 | } | |
2737 | ||
1f91b4cc | 2738 | dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); |
5b7d70c6 BD |
2739 | } |
2740 | ||
32601588 VM |
2741 | /** |
2742 | * dwc2_gadget_read_ep_interrupts - reads interrupts for given ep | |
2743 | * @hsotg: The device state. | |
2744 | * @idx: Index of ep. | |
2745 | * @dir_in: Endpoint direction 1-in 0-out. | |
2746 | * | |
2747 | * Reads for endpoint with given index and direction, by masking | |
2748 | * epint_reg with coresponding mask. | |
2749 | */ | |
2750 | static u32 dwc2_gadget_read_ep_interrupts(struct dwc2_hsotg *hsotg, | |
2751 | unsigned int idx, int dir_in) | |
2752 | { | |
2753 | u32 epmsk_reg = dir_in ? DIEPMSK : DOEPMSK; | |
2754 | u32 epint_reg = dir_in ? DIEPINT(idx) : DOEPINT(idx); | |
2755 | u32 ints; | |
2756 | u32 mask; | |
2757 | u32 diepempmsk; | |
2758 | ||
f25c42b8 GS |
2759 | mask = dwc2_readl(hsotg, epmsk_reg); |
2760 | diepempmsk = dwc2_readl(hsotg, DIEPEMPMSK); | |
32601588 VM |
2761 | mask |= ((diepempmsk >> idx) & 0x1) ? DIEPMSK_TXFIFOEMPTY : 0; |
2762 | mask |= DXEPINT_SETUP_RCVD; | |
2763 | ||
f25c42b8 | 2764 | ints = dwc2_readl(hsotg, epint_reg); |
32601588 VM |
2765 | ints &= mask; |
2766 | return ints; | |
2767 | } | |
2768 | ||
bd9971f0 VM |
2769 | /** |
2770 | * dwc2_gadget_handle_ep_disabled - handle DXEPINT_EPDISBLD | |
2771 | * @hs_ep: The endpoint on which interrupt is asserted. | |
2772 | * | |
2773 | * This interrupt indicates that the endpoint has been disabled per the | |
2774 | * application's request. | |
2775 | * | |
2776 | * For IN endpoints flushes txfifo, in case of BULK clears DCTL_CGNPINNAK, | |
2777 | * in case of ISOC completes current request. | |
2778 | * | |
2779 | * For ISOC-OUT endpoints completes expired requests. If there is remaining | |
2780 | * request starts it. | |
2781 | */ | |
2782 | static void dwc2_gadget_handle_ep_disabled(struct dwc2_hsotg_ep *hs_ep) | |
2783 | { | |
2784 | struct dwc2_hsotg *hsotg = hs_ep->parent; | |
2785 | struct dwc2_hsotg_req *hs_req; | |
2786 | unsigned char idx = hs_ep->index; | |
2787 | int dir_in = hs_ep->dir_in; | |
2788 | u32 epctl_reg = dir_in ? DIEPCTL(idx) : DOEPCTL(idx); | |
f25c42b8 | 2789 | int dctl = dwc2_readl(hsotg, DCTL); |
bd9971f0 VM |
2790 | |
2791 | dev_dbg(hsotg->dev, "%s: EPDisbld\n", __func__); | |
2792 | ||
2793 | if (dir_in) { | |
f25c42b8 | 2794 | int epctl = dwc2_readl(hsotg, epctl_reg); |
bd9971f0 VM |
2795 | |
2796 | dwc2_hsotg_txfifo_flush(hsotg, hs_ep->fifo_index); | |
2797 | ||
2798 | if (hs_ep->isochronous) { | |
2799 | dwc2_hsotg_complete_in(hsotg, hs_ep); | |
2800 | return; | |
2801 | } | |
2802 | ||
2803 | if ((epctl & DXEPCTL_STALL) && (epctl & DXEPCTL_EPTYPE_BULK)) { | |
f25c42b8 | 2804 | int dctl = dwc2_readl(hsotg, DCTL); |
bd9971f0 VM |
2805 | |
2806 | dctl |= DCTL_CGNPINNAK; | |
f25c42b8 | 2807 | dwc2_writel(hsotg, dctl, DCTL); |
bd9971f0 VM |
2808 | } |
2809 | return; | |
2810 | } | |
2811 | ||
2812 | if (dctl & DCTL_GOUTNAKSTS) { | |
2813 | dctl |= DCTL_CGOUTNAK; | |
f25c42b8 | 2814 | dwc2_writel(hsotg, dctl, DCTL); |
bd9971f0 VM |
2815 | } |
2816 | ||
2817 | if (!hs_ep->isochronous) | |
2818 | return; | |
2819 | ||
2820 | if (list_empty(&hs_ep->queue)) { | |
2821 | dev_dbg(hsotg->dev, "%s: complete_ep 0x%p, ep->queue empty!\n", | |
2822 | __func__, hs_ep); | |
2823 | return; | |
2824 | } | |
2825 | ||
2826 | do { | |
2827 | hs_req = get_ep_head(hs_ep); | |
2828 | if (hs_req) | |
2829 | dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, | |
2830 | -ENODATA); | |
2831 | dwc2_gadget_incr_frame_num(hs_ep); | |
c7c24e7a AP |
2832 | /* Update current frame number value. */ |
2833 | hsotg->frame_number = dwc2_hsotg_read_frameno(hsotg); | |
bd9971f0 VM |
2834 | } while (dwc2_gadget_target_frame_elapsed(hs_ep)); |
2835 | ||
2836 | dwc2_gadget_start_next_request(hs_ep); | |
2837 | } | |
2838 | ||
5321922c VM |
2839 | /** |
2840 | * dwc2_gadget_handle_out_token_ep_disabled - handle DXEPINT_OUTTKNEPDIS | |
6fb914d7 | 2841 | * @ep: The endpoint on which interrupt is asserted. |
5321922c VM |
2842 | * |
2843 | * This is starting point for ISOC-OUT transfer, synchronization done with | |
2844 | * first out token received from host while corresponding EP is disabled. | |
2845 | * | |
2846 | * Device does not know initial frame in which out token will come. For this | |
2847 | * HW generates OUTTKNEPDIS - out token is received while EP is disabled. Upon | |
2848 | * getting this interrupt SW starts calculation for next transfer frame. | |
2849 | */ | |
2850 | static void dwc2_gadget_handle_out_token_ep_disabled(struct dwc2_hsotg_ep *ep) | |
2851 | { | |
2852 | struct dwc2_hsotg *hsotg = ep->parent; | |
2853 | int dir_in = ep->dir_in; | |
2854 | u32 doepmsk; | |
2855 | ||
2856 | if (dir_in || !ep->isochronous) | |
2857 | return; | |
2858 | ||
540ccba0 VA |
2859 | if (using_desc_dma(hsotg)) { |
2860 | if (ep->target_frame == TARGET_FRAME_INITIAL) { | |
2861 | /* Start first ISO Out */ | |
4d4f1e79 | 2862 | ep->target_frame = hsotg->frame_number; |
540ccba0 VA |
2863 | dwc2_gadget_start_isoc_ddma(ep); |
2864 | } | |
2865 | return; | |
2866 | } | |
2867 | ||
5321922c VM |
2868 | if (ep->interval > 1 && |
2869 | ep->target_frame == TARGET_FRAME_INITIAL) { | |
5321922c VM |
2870 | u32 ctrl; |
2871 | ||
4d4f1e79 | 2872 | ep->target_frame = hsotg->frame_number; |
5321922c VM |
2873 | dwc2_gadget_incr_frame_num(ep); |
2874 | ||
f25c42b8 | 2875 | ctrl = dwc2_readl(hsotg, DOEPCTL(ep->index)); |
5321922c VM |
2876 | if (ep->target_frame & 0x1) |
2877 | ctrl |= DXEPCTL_SETODDFR; | |
2878 | else | |
2879 | ctrl |= DXEPCTL_SETEVENFR; | |
2880 | ||
f25c42b8 | 2881 | dwc2_writel(hsotg, ctrl, DOEPCTL(ep->index)); |
5321922c VM |
2882 | } |
2883 | ||
2884 | dwc2_gadget_start_next_request(ep); | |
f25c42b8 | 2885 | doepmsk = dwc2_readl(hsotg, DOEPMSK); |
5321922c | 2886 | doepmsk &= ~DOEPMSK_OUTTKNEPDISMSK; |
f25c42b8 | 2887 | dwc2_writel(hsotg, doepmsk, DOEPMSK); |
5321922c VM |
2888 | } |
2889 | ||
2890 | /** | |
38beaec6 JY |
2891 | * dwc2_gadget_handle_nak - handle NAK interrupt |
2892 | * @hs_ep: The endpoint on which interrupt is asserted. | |
2893 | * | |
2894 | * This is starting point for ISOC-IN transfer, synchronization done with | |
2895 | * first IN token received from host while corresponding EP is disabled. | |
2896 | * | |
2897 | * Device does not know when first one token will arrive from host. On first | |
2898 | * token arrival HW generates 2 interrupts: 'in token received while FIFO empty' | |
2899 | * and 'NAK'. NAK interrupt for ISOC-IN means that token has arrived and ZLP was | |
2900 | * sent in response to that as there was no data in FIFO. SW is basing on this | |
2901 | * interrupt to obtain frame in which token has come and then based on the | |
2902 | * interval calculates next frame for transfer. | |
2903 | */ | |
5321922c VM |
2904 | static void dwc2_gadget_handle_nak(struct dwc2_hsotg_ep *hs_ep) |
2905 | { | |
2906 | struct dwc2_hsotg *hsotg = hs_ep->parent; | |
2907 | int dir_in = hs_ep->dir_in; | |
2908 | ||
2909 | if (!dir_in || !hs_ep->isochronous) | |
2910 | return; | |
2911 | ||
2912 | if (hs_ep->target_frame == TARGET_FRAME_INITIAL) { | |
540ccba0 VA |
2913 | |
2914 | if (using_desc_dma(hsotg)) { | |
4d4f1e79 | 2915 | hs_ep->target_frame = hsotg->frame_number; |
729cac69 | 2916 | dwc2_gadget_incr_frame_num(hs_ep); |
48dac4e4 GT |
2917 | |
2918 | /* In service interval mode target_frame must | |
2919 | * be set to last (u)frame of the service interval. | |
2920 | */ | |
2921 | if (hsotg->params.service_interval) { | |
2922 | /* Set target_frame to the first (u)frame of | |
2923 | * the service interval | |
2924 | */ | |
2925 | hs_ep->target_frame &= ~hs_ep->interval + 1; | |
2926 | ||
2927 | /* Set target_frame to the last (u)frame of | |
2928 | * the service interval | |
2929 | */ | |
2930 | dwc2_gadget_incr_frame_num(hs_ep); | |
2931 | dwc2_gadget_dec_frame_num_by_one(hs_ep); | |
2932 | } | |
2933 | ||
540ccba0 VA |
2934 | dwc2_gadget_start_isoc_ddma(hs_ep); |
2935 | return; | |
2936 | } | |
2937 | ||
4d4f1e79 | 2938 | hs_ep->target_frame = hsotg->frame_number; |
5321922c | 2939 | if (hs_ep->interval > 1) { |
f25c42b8 | 2940 | u32 ctrl = dwc2_readl(hsotg, |
5321922c VM |
2941 | DIEPCTL(hs_ep->index)); |
2942 | if (hs_ep->target_frame & 0x1) | |
2943 | ctrl |= DXEPCTL_SETODDFR; | |
2944 | else | |
2945 | ctrl |= DXEPCTL_SETEVENFR; | |
2946 | ||
f25c42b8 | 2947 | dwc2_writel(hsotg, ctrl, DIEPCTL(hs_ep->index)); |
5321922c VM |
2948 | } |
2949 | ||
2950 | dwc2_hsotg_complete_request(hsotg, hs_ep, | |
2951 | get_ep_head(hs_ep), 0); | |
2952 | } | |
2953 | ||
729cac69 MH |
2954 | if (!using_desc_dma(hsotg)) |
2955 | dwc2_gadget_incr_frame_num(hs_ep); | |
5321922c VM |
2956 | } |
2957 | ||
5b7d70c6 | 2958 | /** |
1f91b4cc | 2959 | * dwc2_hsotg_epint - handle an in/out endpoint interrupt |
5b7d70c6 BD |
2960 | * @hsotg: The driver state |
2961 | * @idx: The index for the endpoint (0..15) | |
2962 | * @dir_in: Set if this is an IN endpoint | |
2963 | * | |
2964 | * Process and clear any interrupt pending for an individual endpoint | |
8b9bc460 | 2965 | */ |
1f91b4cc | 2966 | static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx, |
9da51974 | 2967 | int dir_in) |
5b7d70c6 | 2968 | { |
1f91b4cc | 2969 | struct dwc2_hsotg_ep *hs_ep = index_to_ep(hsotg, idx, dir_in); |
94cb8fd6 LM |
2970 | u32 epint_reg = dir_in ? DIEPINT(idx) : DOEPINT(idx); |
2971 | u32 epctl_reg = dir_in ? DIEPCTL(idx) : DOEPCTL(idx); | |
2972 | u32 epsiz_reg = dir_in ? DIEPTSIZ(idx) : DOEPTSIZ(idx); | |
5b7d70c6 | 2973 | u32 ints; |
1479e841 | 2974 | u32 ctrl; |
5b7d70c6 | 2975 | |
32601588 | 2976 | ints = dwc2_gadget_read_ep_interrupts(hsotg, idx, dir_in); |
f25c42b8 | 2977 | ctrl = dwc2_readl(hsotg, epctl_reg); |
5b7d70c6 | 2978 | |
a3395f0d | 2979 | /* Clear endpoint interrupts */ |
f25c42b8 | 2980 | dwc2_writel(hsotg, ints, epint_reg); |
a3395f0d | 2981 | |
c6f5c050 MYK |
2982 | if (!hs_ep) { |
2983 | dev_err(hsotg->dev, "%s:Interrupt for unconfigured ep%d(%s)\n", | |
9da51974 | 2984 | __func__, idx, dir_in ? "in" : "out"); |
c6f5c050 MYK |
2985 | return; |
2986 | } | |
2987 | ||
5b7d70c6 BD |
2988 | dev_dbg(hsotg->dev, "%s: ep%d(%s) DxEPINT=0x%08x\n", |
2989 | __func__, idx, dir_in ? "in" : "out", ints); | |
2990 | ||
b787d755 MYK |
2991 | /* Don't process XferCompl interrupt if it is a setup packet */ |
2992 | if (idx == 0 && (ints & (DXEPINT_SETUP | DXEPINT_SETUP_RCVD))) | |
2993 | ints &= ~DXEPINT_XFERCOMPL; | |
2994 | ||
f0afdb42 VA |
2995 | /* |
2996 | * Don't process XferCompl interrupt in DDMA if EP0 is still in SETUP | |
2997 | * stage and xfercomplete was generated without SETUP phase done | |
2998 | * interrupt. SW should parse received setup packet only after host's | |
2999 | * exit from setup phase of control transfer. | |
3000 | */ | |
3001 | if (using_desc_dma(hsotg) && idx == 0 && !hs_ep->dir_in && | |
3002 | hsotg->ep0_state == DWC2_EP0_SETUP && !(ints & DXEPINT_SETUP)) | |
3003 | ints &= ~DXEPINT_XFERCOMPL; | |
3004 | ||
837e9f00 | 3005 | if (ints & DXEPINT_XFERCOMPL) { |
5b7d70c6 | 3006 | dev_dbg(hsotg->dev, |
47a1685f | 3007 | "%s: XferCompl: DxEPCTL=0x%08x, DXEPTSIZ=%08x\n", |
f25c42b8 GS |
3008 | __func__, dwc2_readl(hsotg, epctl_reg), |
3009 | dwc2_readl(hsotg, epsiz_reg)); | |
5b7d70c6 | 3010 | |
540ccba0 VA |
3011 | /* In DDMA handle isochronous requests separately */ |
3012 | if (using_desc_dma(hsotg) && hs_ep->isochronous) { | |
729cac69 MH |
3013 | /* XferCompl set along with BNA */ |
3014 | if (!(ints & DXEPINT_BNAINTR)) | |
3015 | dwc2_gadget_complete_isoc_request_ddma(hs_ep); | |
540ccba0 VA |
3016 | } else if (dir_in) { |
3017 | /* | |
3018 | * We get OutDone from the FIFO, so we only | |
3019 | * need to look at completing IN requests here | |
3020 | * if operating slave mode | |
3021 | */ | |
837e9f00 VM |
3022 | if (hs_ep->isochronous && hs_ep->interval > 1) |
3023 | dwc2_gadget_incr_frame_num(hs_ep); | |
3024 | ||
1f91b4cc | 3025 | dwc2_hsotg_complete_in(hsotg, hs_ep); |
837e9f00 VM |
3026 | if (ints & DXEPINT_NAKINTRPT) |
3027 | ints &= ~DXEPINT_NAKINTRPT; | |
5b7d70c6 | 3028 | |
c9a64ea8 | 3029 | if (idx == 0 && !hs_ep->req) |
1f91b4cc | 3030 | dwc2_hsotg_enqueue_setup(hsotg); |
5b7d70c6 | 3031 | } else if (using_dma(hsotg)) { |
8b9bc460 LM |
3032 | /* |
3033 | * We're using DMA, we need to fire an OutDone here | |
3034 | * as we ignore the RXFIFO. | |
3035 | */ | |
837e9f00 VM |
3036 | if (hs_ep->isochronous && hs_ep->interval > 1) |
3037 | dwc2_gadget_incr_frame_num(hs_ep); | |
5b7d70c6 | 3038 | |
1f91b4cc | 3039 | dwc2_hsotg_handle_outdone(hsotg, idx); |
5b7d70c6 | 3040 | } |
5b7d70c6 BD |
3041 | } |
3042 | ||
bd9971f0 VM |
3043 | if (ints & DXEPINT_EPDISBLD) |
3044 | dwc2_gadget_handle_ep_disabled(hs_ep); | |
9c39ddc6 | 3045 | |
5321922c VM |
3046 | if (ints & DXEPINT_OUTTKNEPDIS) |
3047 | dwc2_gadget_handle_out_token_ep_disabled(hs_ep); | |
3048 | ||
3049 | if (ints & DXEPINT_NAKINTRPT) | |
3050 | dwc2_gadget_handle_nak(hs_ep); | |
3051 | ||
47a1685f | 3052 | if (ints & DXEPINT_AHBERR) |
5b7d70c6 | 3053 | dev_dbg(hsotg->dev, "%s: AHBErr\n", __func__); |
5b7d70c6 | 3054 | |
47a1685f | 3055 | if (ints & DXEPINT_SETUP) { /* Setup or Timeout */ |
5b7d70c6 BD |
3056 | dev_dbg(hsotg->dev, "%s: Setup/Timeout\n", __func__); |
3057 | ||
3058 | if (using_dma(hsotg) && idx == 0) { | |
8b9bc460 LM |
3059 | /* |
3060 | * this is the notification we've received a | |
5b7d70c6 BD |
3061 | * setup packet. In non-DMA mode we'd get this |
3062 | * from the RXFIFO, instead we need to process | |
8b9bc460 LM |
3063 | * the setup here. |
3064 | */ | |
5b7d70c6 BD |
3065 | |
3066 | if (dir_in) | |
3067 | WARN_ON_ONCE(1); | |
3068 | else | |
1f91b4cc | 3069 | dwc2_hsotg_handle_outdone(hsotg, 0); |
5b7d70c6 | 3070 | } |
5b7d70c6 BD |
3071 | } |
3072 | ||
ef750c71 | 3073 | if (ints & DXEPINT_STSPHSERCVD) { |
9d9a6b07 VA |
3074 | dev_dbg(hsotg->dev, "%s: StsPhseRcvd\n", __func__); |
3075 | ||
9e95a66c MH |
3076 | /* Safety check EP0 state when STSPHSERCVD asserted */ |
3077 | if (hsotg->ep0_state == DWC2_EP0_DATA_OUT) { | |
3078 | /* Move to STATUS IN for DDMA */ | |
b4c53b4a MH |
3079 | if (using_desc_dma(hsotg)) { |
3080 | if (!hsotg->delayed_status) | |
3081 | dwc2_hsotg_ep0_zlp(hsotg, true); | |
3082 | else | |
3083 | /* In case of 3 stage Control Write with delayed | |
3084 | * status, when Status IN transfer started | |
3085 | * before STSPHSERCVD asserted, NAKSTS bit not | |
3086 | * cleared by CNAK in dwc2_hsotg_start_req() | |
3087 | * function. Clear now NAKSTS to allow complete | |
3088 | * transfer. | |
3089 | */ | |
3090 | dwc2_set_bit(hsotg, DIEPCTL(0), | |
3091 | DXEPCTL_CNAK); | |
3092 | } | |
9e95a66c MH |
3093 | } |
3094 | ||
ef750c71 VA |
3095 | } |
3096 | ||
47a1685f | 3097 | if (ints & DXEPINT_BACK2BACKSETUP) |
5b7d70c6 | 3098 | dev_dbg(hsotg->dev, "%s: B2BSetup/INEPNakEff\n", __func__); |
5b7d70c6 | 3099 | |
540ccba0 VA |
3100 | if (ints & DXEPINT_BNAINTR) { |
3101 | dev_dbg(hsotg->dev, "%s: BNA interrupt\n", __func__); | |
540ccba0 | 3102 | if (hs_ep->isochronous) |
729cac69 | 3103 | dwc2_gadget_handle_isoc_bna(hs_ep); |
540ccba0 VA |
3104 | } |
3105 | ||
1479e841 | 3106 | if (dir_in && !hs_ep->isochronous) { |
8b9bc460 | 3107 | /* not sure if this is important, but we'll clear it anyway */ |
26ddef5d | 3108 | if (ints & DXEPINT_INTKNTXFEMP) { |
5b7d70c6 BD |
3109 | dev_dbg(hsotg->dev, "%s: ep%d: INTknTXFEmpMsk\n", |
3110 | __func__, idx); | |
5b7d70c6 BD |
3111 | } |
3112 | ||
3113 | /* this probably means something bad is happening */ | |
26ddef5d | 3114 | if (ints & DXEPINT_INTKNEPMIS) { |
5b7d70c6 BD |
3115 | dev_warn(hsotg->dev, "%s: ep%d: INTknEP\n", |
3116 | __func__, idx); | |
5b7d70c6 | 3117 | } |
10aebc77 BD |
3118 | |
3119 | /* FIFO has space or is empty (see GAHBCFG) */ | |
3120 | if (hsotg->dedicated_fifos && | |
26ddef5d | 3121 | ints & DXEPINT_TXFEMP) { |
10aebc77 BD |
3122 | dev_dbg(hsotg->dev, "%s: ep%d: TxFIFOEmpty\n", |
3123 | __func__, idx); | |
70fa030f | 3124 | if (!using_dma(hsotg)) |
1f91b4cc | 3125 | dwc2_hsotg_trytx(hsotg, hs_ep); |
10aebc77 | 3126 | } |
5b7d70c6 | 3127 | } |
5b7d70c6 BD |
3128 | } |
3129 | ||
3130 | /** | |
1f91b4cc | 3131 | * dwc2_hsotg_irq_enumdone - Handle EnumDone interrupt (enumeration done) |
5b7d70c6 BD |
3132 | * @hsotg: The device state. |
3133 | * | |
3134 | * Handle updating the device settings after the enumeration phase has | |
3135 | * been completed. | |
8b9bc460 | 3136 | */ |
1f91b4cc | 3137 | static void dwc2_hsotg_irq_enumdone(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 3138 | { |
f25c42b8 | 3139 | u32 dsts = dwc2_readl(hsotg, DSTS); |
9b2667f1 | 3140 | int ep0_mps = 0, ep_mps = 8; |
5b7d70c6 | 3141 | |
8b9bc460 LM |
3142 | /* |
3143 | * This should signal the finish of the enumeration phase | |
5b7d70c6 | 3144 | * of the USB handshaking, so we should now know what rate |
8b9bc460 LM |
3145 | * we connected at. |
3146 | */ | |
5b7d70c6 BD |
3147 | |
3148 | dev_dbg(hsotg->dev, "EnumDone (DSTS=0x%08x)\n", dsts); | |
3149 | ||
8b9bc460 LM |
3150 | /* |
3151 | * note, since we're limited by the size of transfer on EP0, and | |
5b7d70c6 | 3152 | * it seems IN transfers must be a even number of packets we do |
8b9bc460 LM |
3153 | * not advertise a 64byte MPS on EP0. |
3154 | */ | |
5b7d70c6 BD |
3155 | |
3156 | /* catch both EnumSpd_FS and EnumSpd_FS48 */ | |
6d76c92c | 3157 | switch ((dsts & DSTS_ENUMSPD_MASK) >> DSTS_ENUMSPD_SHIFT) { |
47a1685f DN |
3158 | case DSTS_ENUMSPD_FS: |
3159 | case DSTS_ENUMSPD_FS48: | |
5b7d70c6 | 3160 | hsotg->gadget.speed = USB_SPEED_FULL; |
5b7d70c6 | 3161 | ep0_mps = EP0_MPS_LIMIT; |
295538ff | 3162 | ep_mps = 1023; |
5b7d70c6 BD |
3163 | break; |
3164 | ||
47a1685f | 3165 | case DSTS_ENUMSPD_HS: |
5b7d70c6 | 3166 | hsotg->gadget.speed = USB_SPEED_HIGH; |
5b7d70c6 | 3167 | ep0_mps = EP0_MPS_LIMIT; |
295538ff | 3168 | ep_mps = 1024; |
5b7d70c6 BD |
3169 | break; |
3170 | ||
47a1685f | 3171 | case DSTS_ENUMSPD_LS: |
5b7d70c6 | 3172 | hsotg->gadget.speed = USB_SPEED_LOW; |
552d940f VM |
3173 | ep0_mps = 8; |
3174 | ep_mps = 8; | |
8b9bc460 LM |
3175 | /* |
3176 | * note, we don't actually support LS in this driver at the | |
5b7d70c6 BD |
3177 | * moment, and the documentation seems to imply that it isn't |
3178 | * supported by the PHYs on some of the devices. | |
3179 | */ | |
3180 | break; | |
3181 | } | |
e538dfda MN |
3182 | dev_info(hsotg->dev, "new device is %s\n", |
3183 | usb_speed_string(hsotg->gadget.speed)); | |
5b7d70c6 | 3184 | |
8b9bc460 LM |
3185 | /* |
3186 | * we should now know the maximum packet size for an | |
3187 | * endpoint, so set the endpoints to a default value. | |
3188 | */ | |
5b7d70c6 BD |
3189 | |
3190 | if (ep0_mps) { | |
3191 | int i; | |
c6f5c050 | 3192 | /* Initialize ep0 for both in and out directions */ |
ee2c40de VM |
3193 | dwc2_hsotg_set_ep_maxpacket(hsotg, 0, ep0_mps, 0, 1); |
3194 | dwc2_hsotg_set_ep_maxpacket(hsotg, 0, ep0_mps, 0, 0); | |
c6f5c050 MYK |
3195 | for (i = 1; i < hsotg->num_of_eps; i++) { |
3196 | if (hsotg->eps_in[i]) | |
ee2c40de VM |
3197 | dwc2_hsotg_set_ep_maxpacket(hsotg, i, ep_mps, |
3198 | 0, 1); | |
c6f5c050 | 3199 | if (hsotg->eps_out[i]) |
ee2c40de VM |
3200 | dwc2_hsotg_set_ep_maxpacket(hsotg, i, ep_mps, |
3201 | 0, 0); | |
c6f5c050 | 3202 | } |
5b7d70c6 BD |
3203 | } |
3204 | ||
3205 | /* ensure after enumeration our EP0 is active */ | |
3206 | ||
1f91b4cc | 3207 | dwc2_hsotg_enqueue_setup(hsotg); |
5b7d70c6 BD |
3208 | |
3209 | dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", | |
f25c42b8 GS |
3210 | dwc2_readl(hsotg, DIEPCTL0), |
3211 | dwc2_readl(hsotg, DOEPCTL0)); | |
5b7d70c6 BD |
3212 | } |
3213 | ||
3214 | /** | |
3215 | * kill_all_requests - remove all requests from the endpoint's queue | |
3216 | * @hsotg: The device state. | |
3217 | * @ep: The endpoint the requests may be on. | |
3218 | * @result: The result code to use. | |
5b7d70c6 BD |
3219 | * |
3220 | * Go through the requests on the given endpoint and mark them | |
3221 | * completed with the given result code. | |
3222 | */ | |
941fcce4 | 3223 | static void kill_all_requests(struct dwc2_hsotg *hsotg, |
1f91b4cc | 3224 | struct dwc2_hsotg_ep *ep, |
6b448af4 | 3225 | int result) |
5b7d70c6 | 3226 | { |
1f91b4cc | 3227 | struct dwc2_hsotg_req *req, *treq; |
9da51974 | 3228 | unsigned int size; |
5b7d70c6 | 3229 | |
6b448af4 | 3230 | ep->req = NULL; |
5b7d70c6 | 3231 | |
6b448af4 | 3232 | list_for_each_entry_safe(req, treq, &ep->queue, queue) |
1f91b4cc | 3233 | dwc2_hsotg_complete_request(hsotg, ep, req, |
9da51974 | 3234 | result); |
6b448af4 | 3235 | |
b203d0a2 RB |
3236 | if (!hsotg->dedicated_fifos) |
3237 | return; | |
f25c42b8 | 3238 | size = (dwc2_readl(hsotg, DTXFSTS(ep->fifo_index)) & 0xffff) * 4; |
b203d0a2 | 3239 | if (size < ep->fifo_size) |
1f91b4cc | 3240 | dwc2_hsotg_txfifo_flush(hsotg, ep->fifo_index); |
5b7d70c6 BD |
3241 | } |
3242 | ||
5b7d70c6 | 3243 | /** |
1f91b4cc | 3244 | * dwc2_hsotg_disconnect - disconnect service |
5b7d70c6 BD |
3245 | * @hsotg: The device state. |
3246 | * | |
5e891342 LM |
3247 | * The device has been disconnected. Remove all current |
3248 | * transactions and signal the gadget driver that this | |
3249 | * has happened. | |
8b9bc460 | 3250 | */ |
1f91b4cc | 3251 | void dwc2_hsotg_disconnect(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 3252 | { |
9da51974 | 3253 | unsigned int ep; |
5b7d70c6 | 3254 | |
4ace06e8 MS |
3255 | if (!hsotg->connected) |
3256 | return; | |
3257 | ||
3258 | hsotg->connected = 0; | |
9e14d0a5 | 3259 | hsotg->test_mode = 0; |
c6f5c050 | 3260 | |
dccf1bad | 3261 | /* all endpoints should be shutdown */ |
c6f5c050 MYK |
3262 | for (ep = 0; ep < hsotg->num_of_eps; ep++) { |
3263 | if (hsotg->eps_in[ep]) | |
4fe4f9fe MH |
3264 | kill_all_requests(hsotg, hsotg->eps_in[ep], |
3265 | -ESHUTDOWN); | |
c6f5c050 | 3266 | if (hsotg->eps_out[ep]) |
4fe4f9fe MH |
3267 | kill_all_requests(hsotg, hsotg->eps_out[ep], |
3268 | -ESHUTDOWN); | |
c6f5c050 | 3269 | } |
5b7d70c6 BD |
3270 | |
3271 | call_gadget(hsotg, disconnect); | |
065d3931 | 3272 | hsotg->lx_state = DWC2_L3; |
ce2b21a4 JS |
3273 | |
3274 | usb_gadget_set_state(&hsotg->gadget, USB_STATE_NOTATTACHED); | |
5b7d70c6 BD |
3275 | } |
3276 | ||
3277 | /** | |
1f91b4cc | 3278 | * dwc2_hsotg_irq_fifoempty - TX FIFO empty interrupt handler |
5b7d70c6 BD |
3279 | * @hsotg: The device state: |
3280 | * @periodic: True if this is a periodic FIFO interrupt | |
3281 | */ | |
1f91b4cc | 3282 | static void dwc2_hsotg_irq_fifoempty(struct dwc2_hsotg *hsotg, bool periodic) |
5b7d70c6 | 3283 | { |
1f91b4cc | 3284 | struct dwc2_hsotg_ep *ep; |
5b7d70c6 BD |
3285 | int epno, ret; |
3286 | ||
3287 | /* look through for any more data to transmit */ | |
b3f489b2 | 3288 | for (epno = 0; epno < hsotg->num_of_eps; epno++) { |
c6f5c050 MYK |
3289 | ep = index_to_ep(hsotg, epno, 1); |
3290 | ||
3291 | if (!ep) | |
3292 | continue; | |
5b7d70c6 BD |
3293 | |
3294 | if (!ep->dir_in) | |
3295 | continue; | |
3296 | ||
3297 | if ((periodic && !ep->periodic) || | |
3298 | (!periodic && ep->periodic)) | |
3299 | continue; | |
3300 | ||
1f91b4cc | 3301 | ret = dwc2_hsotg_trytx(hsotg, ep); |
5b7d70c6 BD |
3302 | if (ret < 0) |
3303 | break; | |
3304 | } | |
3305 | } | |
3306 | ||
5b7d70c6 | 3307 | /* IRQ flags which will trigger a retry around the IRQ loop */ |
47a1685f DN |
3308 | #define IRQ_RETRY_MASK (GINTSTS_NPTXFEMP | \ |
3309 | GINTSTS_PTXFEMP | \ | |
3310 | GINTSTS_RXFLVL) | |
5b7d70c6 | 3311 | |
4fe4f9fe | 3312 | static int dwc2_hsotg_ep_disable(struct usb_ep *ep); |
8b9bc460 | 3313 | /** |
1f91b4cc | 3314 | * dwc2_hsotg_core_init - issue softreset to the core |
8b9bc460 | 3315 | * @hsotg: The device state |
6fb914d7 | 3316 | * @is_usb_reset: Usb resetting flag |
8b9bc460 LM |
3317 | * |
3318 | * Issue a soft reset to the core, and await the core finishing it. | |
3319 | */ | |
1f91b4cc | 3320 | void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg, |
9da51974 | 3321 | bool is_usb_reset) |
308d734e | 3322 | { |
1ee6903b | 3323 | u32 intmsk; |
643cc4de | 3324 | u32 val; |
ecd9a7ad | 3325 | u32 usbcfg; |
79c3b5bb | 3326 | u32 dcfg = 0; |
dccf1bad | 3327 | int ep; |
643cc4de | 3328 | |
5390d438 MYK |
3329 | /* Kill any ep0 requests as controller will be reinitialized */ |
3330 | kill_all_requests(hsotg, hsotg->eps_out[0], -ECONNRESET); | |
3331 | ||
dccf1bad | 3332 | if (!is_usb_reset) { |
6e6360b6 | 3333 | if (dwc2_core_reset(hsotg, true)) |
86de4895 | 3334 | return; |
dccf1bad MH |
3335 | } else { |
3336 | /* all endpoints should be shutdown */ | |
3337 | for (ep = 1; ep < hsotg->num_of_eps; ep++) { | |
3338 | if (hsotg->eps_in[ep]) | |
3339 | dwc2_hsotg_ep_disable(&hsotg->eps_in[ep]->ep); | |
3340 | if (hsotg->eps_out[ep]) | |
3341 | dwc2_hsotg_ep_disable(&hsotg->eps_out[ep]->ep); | |
3342 | } | |
3343 | } | |
308d734e LM |
3344 | |
3345 | /* | |
3346 | * we must now enable ep0 ready for host detection and then | |
3347 | * set configuration. | |
3348 | */ | |
3349 | ||
ecd9a7ad | 3350 | /* keep other bits untouched (so e.g. forced modes are not lost) */ |
f25c42b8 | 3351 | usbcfg = dwc2_readl(hsotg, GUSBCFG); |
1e868545 | 3352 | usbcfg &= ~GUSBCFG_TOUTCAL_MASK; |
707d80f0 | 3353 | usbcfg |= GUSBCFG_TOUTCAL(7); |
ecd9a7ad | 3354 | |
1e868545 JM |
3355 | /* remove the HNP/SRP and set the PHY */ |
3356 | usbcfg &= ~(GUSBCFG_SRPCAP | GUSBCFG_HNPCAP); | |
3357 | dwc2_writel(hsotg, usbcfg, GUSBCFG); | |
707d80f0 | 3358 | |
1e868545 | 3359 | dwc2_phy_init(hsotg, true); |
308d734e | 3360 | |
1f91b4cc | 3361 | dwc2_hsotg_init_fifo(hsotg); |
308d734e | 3362 | |
643cc4de | 3363 | if (!is_usb_reset) |
f25c42b8 | 3364 | dwc2_set_bit(hsotg, DCTL, DCTL_SFTDISCON); |
308d734e | 3365 | |
79c3b5bb | 3366 | dcfg |= DCFG_EPMISCNT(1); |
38e9002b VM |
3367 | |
3368 | switch (hsotg->params.speed) { | |
3369 | case DWC2_SPEED_PARAM_LOW: | |
3370 | dcfg |= DCFG_DEVSPD_LS; | |
3371 | break; | |
3372 | case DWC2_SPEED_PARAM_FULL: | |
79c3b5bb VA |
3373 | if (hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS) |
3374 | dcfg |= DCFG_DEVSPD_FS48; | |
3375 | else | |
3376 | dcfg |= DCFG_DEVSPD_FS; | |
38e9002b VM |
3377 | break; |
3378 | default: | |
79c3b5bb VA |
3379 | dcfg |= DCFG_DEVSPD_HS; |
3380 | } | |
38e9002b | 3381 | |
b43ebc96 GT |
3382 | if (hsotg->params.ipg_isoc_en) |
3383 | dcfg |= DCFG_IPG_ISOC_SUPPORDED; | |
3384 | ||
f25c42b8 | 3385 | dwc2_writel(hsotg, dcfg, DCFG); |
308d734e LM |
3386 | |
3387 | /* Clear any pending OTG interrupts */ | |
f25c42b8 | 3388 | dwc2_writel(hsotg, 0xffffffff, GOTGINT); |
308d734e LM |
3389 | |
3390 | /* Clear any pending interrupts */ | |
f25c42b8 | 3391 | dwc2_writel(hsotg, 0xffffffff, GINTSTS); |
1ee6903b | 3392 | intmsk = GINTSTS_ERLYSUSP | GINTSTS_SESSREQINT | |
47a1685f | 3393 | GINTSTS_GOUTNAKEFF | GINTSTS_GINNAKEFF | |
1ee6903b GH |
3394 | GINTSTS_USBRST | GINTSTS_RESETDET | |
3395 | GINTSTS_ENUMDONE | GINTSTS_OTGINT | | |
376f0401 SA |
3396 | GINTSTS_USBSUSP | GINTSTS_WKUPINT | |
3397 | GINTSTS_LPMTRANRCVD; | |
f4736701 VA |
3398 | |
3399 | if (!using_desc_dma(hsotg)) | |
3400 | intmsk |= GINTSTS_INCOMPL_SOIN | GINTSTS_INCOMPL_SOOUT; | |
1ee6903b | 3401 | |
95832c00 | 3402 | if (!hsotg->params.external_id_pin_ctl) |
1ee6903b GH |
3403 | intmsk |= GINTSTS_CONIDSTSCHNG; |
3404 | ||
f25c42b8 | 3405 | dwc2_writel(hsotg, intmsk, GINTMSK); |
308d734e | 3406 | |
a5c18f11 | 3407 | if (using_dma(hsotg)) { |
f25c42b8 | 3408 | dwc2_writel(hsotg, GAHBCFG_GLBL_INTR_EN | GAHBCFG_DMA_EN | |
d1ac8c80 | 3409 | hsotg->params.ahbcfg, |
f25c42b8 | 3410 | GAHBCFG); |
a5c18f11 VA |
3411 | |
3412 | /* Set DDMA mode support in the core if needed */ | |
3413 | if (using_desc_dma(hsotg)) | |
f25c42b8 | 3414 | dwc2_set_bit(hsotg, DCFG, DCFG_DESCDMA_EN); |
a5c18f11 VA |
3415 | |
3416 | } else { | |
f25c42b8 | 3417 | dwc2_writel(hsotg, ((hsotg->dedicated_fifos) ? |
95c8bc36 AS |
3418 | (GAHBCFG_NP_TXF_EMP_LVL | |
3419 | GAHBCFG_P_TXF_EMP_LVL) : 0) | | |
f25c42b8 | 3420 | GAHBCFG_GLBL_INTR_EN, GAHBCFG); |
a5c18f11 | 3421 | } |
308d734e LM |
3422 | |
3423 | /* | |
8acc8296 RB |
3424 | * If INTknTXFEmpMsk is enabled, it's important to disable ep interrupts |
3425 | * when we have no data to transfer. Otherwise we get being flooded by | |
3426 | * interrupts. | |
308d734e LM |
3427 | */ |
3428 | ||
f25c42b8 | 3429 | dwc2_writel(hsotg, ((hsotg->dedicated_fifos && !using_dma(hsotg)) ? |
6ff2e832 | 3430 | DIEPMSK_TXFIFOEMPTY | DIEPMSK_INTKNTXFEMPMSK : 0) | |
47a1685f | 3431 | DIEPMSK_EPDISBLDMSK | DIEPMSK_XFERCOMPLMSK | |
837e9f00 | 3432 | DIEPMSK_TIMEOUTMSK | DIEPMSK_AHBERRMSK, |
f25c42b8 | 3433 | DIEPMSK); |
308d734e LM |
3434 | |
3435 | /* | |
3436 | * don't need XferCompl, we get that from RXFIFO in slave mode. In | |
9d9a6b07 | 3437 | * DMA mode we may need this and StsPhseRcvd. |
308d734e | 3438 | */ |
f25c42b8 | 3439 | dwc2_writel(hsotg, (using_dma(hsotg) ? (DIEPMSK_XFERCOMPLMSK | |
9d9a6b07 | 3440 | DOEPMSK_STSPHSERCVDMSK) : 0) | |
47a1685f | 3441 | DOEPMSK_EPDISBLDMSK | DOEPMSK_AHBERRMSK | |
9d9a6b07 | 3442 | DOEPMSK_SETUPMSK, |
f25c42b8 | 3443 | DOEPMSK); |
308d734e | 3444 | |
ec01f0b2 | 3445 | /* Enable BNA interrupt for DDMA */ |
37981e00 | 3446 | if (using_desc_dma(hsotg)) { |
f25c42b8 GS |
3447 | dwc2_set_bit(hsotg, DOEPMSK, DOEPMSK_BNAMSK); |
3448 | dwc2_set_bit(hsotg, DIEPMSK, DIEPMSK_BNAININTRMSK); | |
37981e00 | 3449 | } |
ec01f0b2 | 3450 | |
ca531bc2 GT |
3451 | /* Enable Service Interval mode if supported */ |
3452 | if (using_desc_dma(hsotg) && hsotg->params.service_interval) | |
3453 | dwc2_set_bit(hsotg, DCTL, DCTL_SERVICE_INTERVAL_SUPPORTED); | |
3454 | ||
f25c42b8 | 3455 | dwc2_writel(hsotg, 0, DAINTMSK); |
308d734e LM |
3456 | |
3457 | dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", | |
f25c42b8 GS |
3458 | dwc2_readl(hsotg, DIEPCTL0), |
3459 | dwc2_readl(hsotg, DOEPCTL0)); | |
308d734e LM |
3460 | |
3461 | /* enable in and out endpoint interrupts */ | |
1f91b4cc | 3462 | dwc2_hsotg_en_gsint(hsotg, GINTSTS_OEPINT | GINTSTS_IEPINT); |
308d734e LM |
3463 | |
3464 | /* | |
3465 | * Enable the RXFIFO when in slave mode, as this is how we collect | |
3466 | * the data. In DMA mode, we get events from the FIFO but also | |
3467 | * things we cannot process, so do not use it. | |
3468 | */ | |
3469 | if (!using_dma(hsotg)) | |
1f91b4cc | 3470 | dwc2_hsotg_en_gsint(hsotg, GINTSTS_RXFLVL); |
308d734e LM |
3471 | |
3472 | /* Enable interrupts for EP0 in and out */ | |
1f91b4cc FB |
3473 | dwc2_hsotg_ctrl_epint(hsotg, 0, 0, 1); |
3474 | dwc2_hsotg_ctrl_epint(hsotg, 0, 1, 1); | |
308d734e | 3475 | |
643cc4de | 3476 | if (!is_usb_reset) { |
f25c42b8 | 3477 | dwc2_set_bit(hsotg, DCTL, DCTL_PWRONPRGDONE); |
643cc4de | 3478 | udelay(10); /* see openiboot */ |
f25c42b8 | 3479 | dwc2_clear_bit(hsotg, DCTL, DCTL_PWRONPRGDONE); |
643cc4de | 3480 | } |
308d734e | 3481 | |
f25c42b8 | 3482 | dev_dbg(hsotg->dev, "DCTL=0x%08x\n", dwc2_readl(hsotg, DCTL)); |
308d734e LM |
3483 | |
3484 | /* | |
94cb8fd6 | 3485 | * DxEPCTL_USBActEp says RO in manual, but seems to be set by |
308d734e LM |
3486 | * writing to the EPCTL register.. |
3487 | */ | |
3488 | ||
3489 | /* set to read 1 8byte packet */ | |
f25c42b8 GS |
3490 | dwc2_writel(hsotg, DXEPTSIZ_MC(1) | DXEPTSIZ_PKTCNT(1) | |
3491 | DXEPTSIZ_XFERSIZE(8), DOEPTSIZ0); | |
308d734e | 3492 | |
f25c42b8 | 3493 | dwc2_writel(hsotg, dwc2_hsotg_ep0_mps(hsotg->eps_out[0]->ep.maxpacket) | |
47a1685f DN |
3494 | DXEPCTL_CNAK | DXEPCTL_EPENA | |
3495 | DXEPCTL_USBACTEP, | |
f25c42b8 | 3496 | DOEPCTL0); |
308d734e LM |
3497 | |
3498 | /* enable, but don't activate EP0in */ | |
f25c42b8 GS |
3499 | dwc2_writel(hsotg, dwc2_hsotg_ep0_mps(hsotg->eps_out[0]->ep.maxpacket) | |
3500 | DXEPCTL_USBACTEP, DIEPCTL0); | |
308d734e | 3501 | |
308d734e | 3502 | /* clear global NAKs */ |
643cc4de GH |
3503 | val = DCTL_CGOUTNAK | DCTL_CGNPINNAK; |
3504 | if (!is_usb_reset) | |
3505 | val |= DCTL_SFTDISCON; | |
f25c42b8 | 3506 | dwc2_set_bit(hsotg, DCTL, val); |
308d734e | 3507 | |
21b03405 SA |
3508 | /* configure the core to support LPM */ |
3509 | dwc2_gadget_init_lpm(hsotg); | |
3510 | ||
15d9dbf8 GT |
3511 | /* program GREFCLK register if needed */ |
3512 | if (using_desc_dma(hsotg) && hsotg->params.service_interval) | |
3513 | dwc2_gadget_program_ref_clk(hsotg); | |
3514 | ||
308d734e LM |
3515 | /* must be at-least 3ms to allow bus to see disconnect */ |
3516 | mdelay(3); | |
3517 | ||
065d3931 | 3518 | hsotg->lx_state = DWC2_L0; |
755d7395 VM |
3519 | |
3520 | dwc2_hsotg_enqueue_setup(hsotg); | |
3521 | ||
3522 | dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", | |
f25c42b8 GS |
3523 | dwc2_readl(hsotg, DIEPCTL0), |
3524 | dwc2_readl(hsotg, DOEPCTL0)); | |
ad38dc5d MS |
3525 | } |
3526 | ||
1f91b4cc | 3527 | static void dwc2_hsotg_core_disconnect(struct dwc2_hsotg *hsotg) |
ad38dc5d MS |
3528 | { |
3529 | /* set the soft-disconnect bit */ | |
f25c42b8 | 3530 | dwc2_set_bit(hsotg, DCTL, DCTL_SFTDISCON); |
ad38dc5d | 3531 | } |
ac3c81f3 | 3532 | |
1f91b4cc | 3533 | void dwc2_hsotg_core_connect(struct dwc2_hsotg *hsotg) |
ad38dc5d | 3534 | { |
308d734e | 3535 | /* remove the soft-disconnect and let's go */ |
f25c42b8 | 3536 | dwc2_clear_bit(hsotg, DCTL, DCTL_SFTDISCON); |
308d734e LM |
3537 | } |
3538 | ||
381fc8f8 VM |
3539 | /** |
3540 | * dwc2_gadget_handle_incomplete_isoc_in - handle incomplete ISO IN Interrupt. | |
3541 | * @hsotg: The device state: | |
3542 | * | |
3543 | * This interrupt indicates one of the following conditions occurred while | |
3544 | * transmitting an ISOC transaction. | |
3545 | * - Corrupted IN Token for ISOC EP. | |
3546 | * - Packet not complete in FIFO. | |
3547 | * | |
3548 | * The following actions will be taken: | |
3549 | * - Determine the EP | |
3550 | * - Disable EP; when 'Endpoint Disabled' interrupt is received Flush FIFO | |
3551 | */ | |
3552 | static void dwc2_gadget_handle_incomplete_isoc_in(struct dwc2_hsotg *hsotg) | |
3553 | { | |
3554 | struct dwc2_hsotg_ep *hs_ep; | |
3555 | u32 epctrl; | |
1b4977c7 | 3556 | u32 daintmsk; |
381fc8f8 VM |
3557 | u32 idx; |
3558 | ||
3559 | dev_dbg(hsotg->dev, "Incomplete isoc in interrupt received:\n"); | |
3560 | ||
f25c42b8 | 3561 | daintmsk = dwc2_readl(hsotg, DAINTMSK); |
1b4977c7 | 3562 | |
d5d5f079 | 3563 | for (idx = 1; idx < hsotg->num_of_eps; idx++) { |
381fc8f8 | 3564 | hs_ep = hsotg->eps_in[idx]; |
1b4977c7 | 3565 | /* Proceed only unmasked ISOC EPs */ |
89066b36 | 3566 | if ((BIT(idx) & ~daintmsk) || !hs_ep->isochronous) |
1b4977c7 RK |
3567 | continue; |
3568 | ||
f25c42b8 | 3569 | epctrl = dwc2_readl(hsotg, DIEPCTL(idx)); |
1b4977c7 | 3570 | if ((epctrl & DXEPCTL_EPENA) && |
381fc8f8 VM |
3571 | dwc2_gadget_target_frame_elapsed(hs_ep)) { |
3572 | epctrl |= DXEPCTL_SNAK; | |
3573 | epctrl |= DXEPCTL_EPDIS; | |
f25c42b8 | 3574 | dwc2_writel(hsotg, epctrl, DIEPCTL(idx)); |
381fc8f8 VM |
3575 | } |
3576 | } | |
3577 | ||
3578 | /* Clear interrupt */ | |
f25c42b8 | 3579 | dwc2_writel(hsotg, GINTSTS_INCOMPL_SOIN, GINTSTS); |
381fc8f8 VM |
3580 | } |
3581 | ||
3582 | /** | |
3583 | * dwc2_gadget_handle_incomplete_isoc_out - handle incomplete ISO OUT Interrupt | |
3584 | * @hsotg: The device state: | |
3585 | * | |
3586 | * This interrupt indicates one of the following conditions occurred while | |
3587 | * transmitting an ISOC transaction. | |
3588 | * - Corrupted OUT Token for ISOC EP. | |
3589 | * - Packet not complete in FIFO. | |
3590 | * | |
3591 | * The following actions will be taken: | |
3592 | * - Determine the EP | |
3593 | * - Set DCTL_SGOUTNAK and unmask GOUTNAKEFF if target frame elapsed. | |
3594 | */ | |
3595 | static void dwc2_gadget_handle_incomplete_isoc_out(struct dwc2_hsotg *hsotg) | |
3596 | { | |
3597 | u32 gintsts; | |
3598 | u32 gintmsk; | |
689efb26 | 3599 | u32 daintmsk; |
381fc8f8 VM |
3600 | u32 epctrl; |
3601 | struct dwc2_hsotg_ep *hs_ep; | |
3602 | int idx; | |
3603 | ||
3604 | dev_dbg(hsotg->dev, "%s: GINTSTS_INCOMPL_SOOUT\n", __func__); | |
3605 | ||
f25c42b8 | 3606 | daintmsk = dwc2_readl(hsotg, DAINTMSK); |
689efb26 RK |
3607 | daintmsk >>= DAINT_OUTEP_SHIFT; |
3608 | ||
d5d5f079 | 3609 | for (idx = 1; idx < hsotg->num_of_eps; idx++) { |
381fc8f8 | 3610 | hs_ep = hsotg->eps_out[idx]; |
689efb26 | 3611 | /* Proceed only unmasked ISOC EPs */ |
89066b36 | 3612 | if ((BIT(idx) & ~daintmsk) || !hs_ep->isochronous) |
689efb26 RK |
3613 | continue; |
3614 | ||
f25c42b8 | 3615 | epctrl = dwc2_readl(hsotg, DOEPCTL(idx)); |
689efb26 | 3616 | if ((epctrl & DXEPCTL_EPENA) && |
381fc8f8 VM |
3617 | dwc2_gadget_target_frame_elapsed(hs_ep)) { |
3618 | /* Unmask GOUTNAKEFF interrupt */ | |
f25c42b8 | 3619 | gintmsk = dwc2_readl(hsotg, GINTMSK); |
381fc8f8 | 3620 | gintmsk |= GINTSTS_GOUTNAKEFF; |
f25c42b8 | 3621 | dwc2_writel(hsotg, gintmsk, GINTMSK); |
381fc8f8 | 3622 | |
f25c42b8 | 3623 | gintsts = dwc2_readl(hsotg, GINTSTS); |
689efb26 | 3624 | if (!(gintsts & GINTSTS_GOUTNAKEFF)) { |
f25c42b8 | 3625 | dwc2_set_bit(hsotg, DCTL, DCTL_SGOUTNAK); |
689efb26 RK |
3626 | break; |
3627 | } | |
381fc8f8 VM |
3628 | } |
3629 | } | |
3630 | ||
3631 | /* Clear interrupt */ | |
f25c42b8 | 3632 | dwc2_writel(hsotg, GINTSTS_INCOMPL_SOOUT, GINTSTS); |
381fc8f8 VM |
3633 | } |
3634 | ||
5b7d70c6 | 3635 | /** |
1f91b4cc | 3636 | * dwc2_hsotg_irq - handle device interrupt |
5b7d70c6 BD |
3637 | * @irq: The IRQ number triggered |
3638 | * @pw: The pw value when registered the handler. | |
3639 | */ | |
1f91b4cc | 3640 | static irqreturn_t dwc2_hsotg_irq(int irq, void *pw) |
5b7d70c6 | 3641 | { |
941fcce4 | 3642 | struct dwc2_hsotg *hsotg = pw; |
5b7d70c6 BD |
3643 | int retry_count = 8; |
3644 | u32 gintsts; | |
3645 | u32 gintmsk; | |
3646 | ||
ee3de8d7 VM |
3647 | if (!dwc2_is_device_mode(hsotg)) |
3648 | return IRQ_NONE; | |
3649 | ||
5ad1d316 | 3650 | spin_lock(&hsotg->lock); |
5b7d70c6 | 3651 | irq_retry: |
f25c42b8 GS |
3652 | gintsts = dwc2_readl(hsotg, GINTSTS); |
3653 | gintmsk = dwc2_readl(hsotg, GINTMSK); | |
5b7d70c6 BD |
3654 | |
3655 | dev_dbg(hsotg->dev, "%s: %08x %08x (%08x) retry %d\n", | |
3656 | __func__, gintsts, gintsts & gintmsk, gintmsk, retry_count); | |
3657 | ||
3658 | gintsts &= gintmsk; | |
3659 | ||
8fc37b82 MYK |
3660 | if (gintsts & GINTSTS_RESETDET) { |
3661 | dev_dbg(hsotg->dev, "%s: USBRstDet\n", __func__); | |
3662 | ||
f25c42b8 | 3663 | dwc2_writel(hsotg, GINTSTS_RESETDET, GINTSTS); |
8fc37b82 MYK |
3664 | |
3665 | /* This event must be used only if controller is suspended */ | |
3666 | if (hsotg->lx_state == DWC2_L2) { | |
41ba9b9b | 3667 | dwc2_exit_partial_power_down(hsotg, true); |
8fc37b82 MYK |
3668 | hsotg->lx_state = DWC2_L0; |
3669 | } | |
3670 | } | |
3671 | ||
3672 | if (gintsts & (GINTSTS_USBRST | GINTSTS_RESETDET)) { | |
f25c42b8 | 3673 | u32 usb_status = dwc2_readl(hsotg, GOTGCTL); |
8fc37b82 MYK |
3674 | u32 connected = hsotg->connected; |
3675 | ||
3676 | dev_dbg(hsotg->dev, "%s: USBRst\n", __func__); | |
3677 | dev_dbg(hsotg->dev, "GNPTXSTS=%08x\n", | |
f25c42b8 | 3678 | dwc2_readl(hsotg, GNPTXSTS)); |
8fc37b82 | 3679 | |
f25c42b8 | 3680 | dwc2_writel(hsotg, GINTSTS_USBRST, GINTSTS); |
8fc37b82 MYK |
3681 | |
3682 | /* Report disconnection if it is not already done. */ | |
3683 | dwc2_hsotg_disconnect(hsotg); | |
3684 | ||
307bc11f | 3685 | /* Reset device address to zero */ |
f25c42b8 | 3686 | dwc2_clear_bit(hsotg, DCFG, DCFG_DEVADDR_MASK); |
307bc11f | 3687 | |
8fc37b82 MYK |
3688 | if (usb_status & GOTGCTL_BSESVLD && connected) |
3689 | dwc2_hsotg_core_init_disconnected(hsotg, true); | |
3690 | } | |
3691 | ||
47a1685f | 3692 | if (gintsts & GINTSTS_ENUMDONE) { |
f25c42b8 | 3693 | dwc2_writel(hsotg, GINTSTS_ENUMDONE, GINTSTS); |
a3395f0d | 3694 | |
1f91b4cc | 3695 | dwc2_hsotg_irq_enumdone(hsotg); |
5b7d70c6 BD |
3696 | } |
3697 | ||
47a1685f | 3698 | if (gintsts & (GINTSTS_OEPINT | GINTSTS_IEPINT)) { |
f25c42b8 GS |
3699 | u32 daint = dwc2_readl(hsotg, DAINT); |
3700 | u32 daintmsk = dwc2_readl(hsotg, DAINTMSK); | |
7e804650 | 3701 | u32 daint_out, daint_in; |
5b7d70c6 BD |
3702 | int ep; |
3703 | ||
7e804650 | 3704 | daint &= daintmsk; |
47a1685f DN |
3705 | daint_out = daint >> DAINT_OUTEP_SHIFT; |
3706 | daint_in = daint & ~(daint_out << DAINT_OUTEP_SHIFT); | |
7e804650 | 3707 | |
5b7d70c6 BD |
3708 | dev_dbg(hsotg->dev, "%s: daint=%08x\n", __func__, daint); |
3709 | ||
cec87f1d MYK |
3710 | for (ep = 0; ep < hsotg->num_of_eps && daint_out; |
3711 | ep++, daint_out >>= 1) { | |
5b7d70c6 | 3712 | if (daint_out & 1) |
1f91b4cc | 3713 | dwc2_hsotg_epint(hsotg, ep, 0); |
5b7d70c6 BD |
3714 | } |
3715 | ||
cec87f1d MYK |
3716 | for (ep = 0; ep < hsotg->num_of_eps && daint_in; |
3717 | ep++, daint_in >>= 1) { | |
5b7d70c6 | 3718 | if (daint_in & 1) |
1f91b4cc | 3719 | dwc2_hsotg_epint(hsotg, ep, 1); |
5b7d70c6 | 3720 | } |
5b7d70c6 BD |
3721 | } |
3722 | ||
5b7d70c6 BD |
3723 | /* check both FIFOs */ |
3724 | ||
47a1685f | 3725 | if (gintsts & GINTSTS_NPTXFEMP) { |
5b7d70c6 BD |
3726 | dev_dbg(hsotg->dev, "NPTxFEmp\n"); |
3727 | ||
8b9bc460 LM |
3728 | /* |
3729 | * Disable the interrupt to stop it happening again | |
5b7d70c6 | 3730 | * unless one of these endpoint routines decides that |
8b9bc460 LM |
3731 | * it needs re-enabling |
3732 | */ | |
5b7d70c6 | 3733 | |
1f91b4cc FB |
3734 | dwc2_hsotg_disable_gsint(hsotg, GINTSTS_NPTXFEMP); |
3735 | dwc2_hsotg_irq_fifoempty(hsotg, false); | |
5b7d70c6 BD |
3736 | } |
3737 | ||
47a1685f | 3738 | if (gintsts & GINTSTS_PTXFEMP) { |
5b7d70c6 BD |
3739 | dev_dbg(hsotg->dev, "PTxFEmp\n"); |
3740 | ||
94cb8fd6 | 3741 | /* See note in GINTSTS_NPTxFEmp */ |
5b7d70c6 | 3742 | |
1f91b4cc FB |
3743 | dwc2_hsotg_disable_gsint(hsotg, GINTSTS_PTXFEMP); |
3744 | dwc2_hsotg_irq_fifoempty(hsotg, true); | |
5b7d70c6 BD |
3745 | } |
3746 | ||
47a1685f | 3747 | if (gintsts & GINTSTS_RXFLVL) { |
8b9bc460 LM |
3748 | /* |
3749 | * note, since GINTSTS_RxFLvl doubles as FIFO-not-empty, | |
1f91b4cc | 3750 | * we need to retry dwc2_hsotg_handle_rx if this is still |
8b9bc460 LM |
3751 | * set. |
3752 | */ | |
5b7d70c6 | 3753 | |
1f91b4cc | 3754 | dwc2_hsotg_handle_rx(hsotg); |
5b7d70c6 BD |
3755 | } |
3756 | ||
47a1685f | 3757 | if (gintsts & GINTSTS_ERLYSUSP) { |
94cb8fd6 | 3758 | dev_dbg(hsotg->dev, "GINTSTS_ErlySusp\n"); |
f25c42b8 | 3759 | dwc2_writel(hsotg, GINTSTS_ERLYSUSP, GINTSTS); |
5b7d70c6 BD |
3760 | } |
3761 | ||
8b9bc460 LM |
3762 | /* |
3763 | * these next two seem to crop-up occasionally causing the core | |
5b7d70c6 | 3764 | * to shutdown the USB transfer, so try clearing them and logging |
8b9bc460 LM |
3765 | * the occurrence. |
3766 | */ | |
5b7d70c6 | 3767 | |
47a1685f | 3768 | if (gintsts & GINTSTS_GOUTNAKEFF) { |
837e9f00 VM |
3769 | u8 idx; |
3770 | u32 epctrl; | |
3771 | u32 gintmsk; | |
d8484552 | 3772 | u32 daintmsk; |
837e9f00 VM |
3773 | struct dwc2_hsotg_ep *hs_ep; |
3774 | ||
f25c42b8 | 3775 | daintmsk = dwc2_readl(hsotg, DAINTMSK); |
d8484552 | 3776 | daintmsk >>= DAINT_OUTEP_SHIFT; |
837e9f00 | 3777 | /* Mask this interrupt */ |
f25c42b8 | 3778 | gintmsk = dwc2_readl(hsotg, GINTMSK); |
837e9f00 | 3779 | gintmsk &= ~GINTSTS_GOUTNAKEFF; |
f25c42b8 | 3780 | dwc2_writel(hsotg, gintmsk, GINTMSK); |
837e9f00 VM |
3781 | |
3782 | dev_dbg(hsotg->dev, "GOUTNakEff triggered\n"); | |
d5d5f079 | 3783 | for (idx = 1; idx < hsotg->num_of_eps; idx++) { |
837e9f00 | 3784 | hs_ep = hsotg->eps_out[idx]; |
d8484552 | 3785 | /* Proceed only unmasked ISOC EPs */ |
89066b36 | 3786 | if ((BIT(idx) & ~daintmsk) || !hs_ep->isochronous) |
d8484552 RK |
3787 | continue; |
3788 | ||
f25c42b8 | 3789 | epctrl = dwc2_readl(hsotg, DOEPCTL(idx)); |
837e9f00 | 3790 | |
d8484552 | 3791 | if (epctrl & DXEPCTL_EPENA) { |
837e9f00 VM |
3792 | epctrl |= DXEPCTL_SNAK; |
3793 | epctrl |= DXEPCTL_EPDIS; | |
f25c42b8 | 3794 | dwc2_writel(hsotg, epctrl, DOEPCTL(idx)); |
837e9f00 VM |
3795 | } |
3796 | } | |
a3395f0d | 3797 | |
837e9f00 | 3798 | /* This interrupt bit is cleared in DXEPINT_EPDISBLD handler */ |
5b7d70c6 BD |
3799 | } |
3800 | ||
47a1685f | 3801 | if (gintsts & GINTSTS_GINNAKEFF) { |
5b7d70c6 BD |
3802 | dev_info(hsotg->dev, "GINNakEff triggered\n"); |
3803 | ||
f25c42b8 | 3804 | dwc2_set_bit(hsotg, DCTL, DCTL_CGNPINNAK); |
a3395f0d | 3805 | |
1f91b4cc | 3806 | dwc2_hsotg_dump(hsotg); |
5b7d70c6 BD |
3807 | } |
3808 | ||
381fc8f8 VM |
3809 | if (gintsts & GINTSTS_INCOMPL_SOIN) |
3810 | dwc2_gadget_handle_incomplete_isoc_in(hsotg); | |
ec1f9d9f | 3811 | |
381fc8f8 VM |
3812 | if (gintsts & GINTSTS_INCOMPL_SOOUT) |
3813 | dwc2_gadget_handle_incomplete_isoc_out(hsotg); | |
ec1f9d9f | 3814 | |
8b9bc460 LM |
3815 | /* |
3816 | * if we've had fifo events, we should try and go around the | |
3817 | * loop again to see if there's any point in returning yet. | |
3818 | */ | |
5b7d70c6 BD |
3819 | |
3820 | if (gintsts & IRQ_RETRY_MASK && --retry_count > 0) | |
77b6200e | 3821 | goto irq_retry; |
5b7d70c6 | 3822 | |
187c5298 GT |
3823 | /* Check WKUP_ALERT interrupt*/ |
3824 | if (hsotg->params.service_interval) | |
3825 | dwc2_gadget_wkup_alert_handler(hsotg); | |
3826 | ||
5ad1d316 LM |
3827 | spin_unlock(&hsotg->lock); |
3828 | ||
5b7d70c6 BD |
3829 | return IRQ_HANDLED; |
3830 | } | |
3831 | ||
a4f82771 VA |
3832 | static void dwc2_hsotg_ep_stop_xfr(struct dwc2_hsotg *hsotg, |
3833 | struct dwc2_hsotg_ep *hs_ep) | |
3834 | { | |
3835 | u32 epctrl_reg; | |
3836 | u32 epint_reg; | |
3837 | ||
3838 | epctrl_reg = hs_ep->dir_in ? DIEPCTL(hs_ep->index) : | |
3839 | DOEPCTL(hs_ep->index); | |
3840 | epint_reg = hs_ep->dir_in ? DIEPINT(hs_ep->index) : | |
3841 | DOEPINT(hs_ep->index); | |
3842 | ||
3843 | dev_dbg(hsotg->dev, "%s: stopping transfer on %s\n", __func__, | |
3844 | hs_ep->name); | |
3845 | ||
3846 | if (hs_ep->dir_in) { | |
3847 | if (hsotg->dedicated_fifos || hs_ep->periodic) { | |
f25c42b8 | 3848 | dwc2_set_bit(hsotg, epctrl_reg, DXEPCTL_SNAK); |
a4f82771 VA |
3849 | /* Wait for Nak effect */ |
3850 | if (dwc2_hsotg_wait_bit_set(hsotg, epint_reg, | |
3851 | DXEPINT_INEPNAKEFF, 100)) | |
3852 | dev_warn(hsotg->dev, | |
3853 | "%s: timeout DIEPINT.NAKEFF\n", | |
3854 | __func__); | |
3855 | } else { | |
f25c42b8 | 3856 | dwc2_set_bit(hsotg, DCTL, DCTL_SGNPINNAK); |
a4f82771 VA |
3857 | /* Wait for Nak effect */ |
3858 | if (dwc2_hsotg_wait_bit_set(hsotg, GINTSTS, | |
3859 | GINTSTS_GINNAKEFF, 100)) | |
3860 | dev_warn(hsotg->dev, | |
3861 | "%s: timeout GINTSTS.GINNAKEFF\n", | |
3862 | __func__); | |
3863 | } | |
3864 | } else { | |
f25c42b8 GS |
3865 | if (!(dwc2_readl(hsotg, GINTSTS) & GINTSTS_GOUTNAKEFF)) |
3866 | dwc2_set_bit(hsotg, DCTL, DCTL_SGOUTNAK); | |
a4f82771 VA |
3867 | |
3868 | /* Wait for global nak to take effect */ | |
3869 | if (dwc2_hsotg_wait_bit_set(hsotg, GINTSTS, | |
3870 | GINTSTS_GOUTNAKEFF, 100)) | |
3871 | dev_warn(hsotg->dev, "%s: timeout GINTSTS.GOUTNAKEFF\n", | |
3872 | __func__); | |
3873 | } | |
3874 | ||
3875 | /* Disable ep */ | |
f25c42b8 | 3876 | dwc2_set_bit(hsotg, epctrl_reg, DXEPCTL_EPDIS | DXEPCTL_SNAK); |
a4f82771 VA |
3877 | |
3878 | /* Wait for ep to be disabled */ | |
3879 | if (dwc2_hsotg_wait_bit_set(hsotg, epint_reg, DXEPINT_EPDISBLD, 100)) | |
3880 | dev_warn(hsotg->dev, | |
3881 | "%s: timeout DOEPCTL.EPDisable\n", __func__); | |
3882 | ||
3883 | /* Clear EPDISBLD interrupt */ | |
f25c42b8 | 3884 | dwc2_set_bit(hsotg, epint_reg, DXEPINT_EPDISBLD); |
a4f82771 VA |
3885 | |
3886 | if (hs_ep->dir_in) { | |
3887 | unsigned short fifo_index; | |
3888 | ||
3889 | if (hsotg->dedicated_fifos || hs_ep->periodic) | |
3890 | fifo_index = hs_ep->fifo_index; | |
3891 | else | |
3892 | fifo_index = 0; | |
3893 | ||
3894 | /* Flush TX FIFO */ | |
3895 | dwc2_flush_tx_fifo(hsotg, fifo_index); | |
3896 | ||
3897 | /* Clear Global In NP NAK in Shared FIFO for non periodic ep */ | |
3898 | if (!hsotg->dedicated_fifos && !hs_ep->periodic) | |
f25c42b8 | 3899 | dwc2_set_bit(hsotg, DCTL, DCTL_CGNPINNAK); |
a4f82771 VA |
3900 | |
3901 | } else { | |
3902 | /* Remove global NAKs */ | |
f25c42b8 | 3903 | dwc2_set_bit(hsotg, DCTL, DCTL_CGOUTNAK); |
a4f82771 VA |
3904 | } |
3905 | } | |
3906 | ||
5b7d70c6 | 3907 | /** |
1f91b4cc | 3908 | * dwc2_hsotg_ep_enable - enable the given endpoint |
5b7d70c6 BD |
3909 | * @ep: The USB endpint to configure |
3910 | * @desc: The USB endpoint descriptor to configure with. | |
3911 | * | |
3912 | * This is called from the USB gadget code's usb_ep_enable(). | |
8b9bc460 | 3913 | */ |
1f91b4cc | 3914 | static int dwc2_hsotg_ep_enable(struct usb_ep *ep, |
9da51974 | 3915 | const struct usb_endpoint_descriptor *desc) |
5b7d70c6 | 3916 | { |
1f91b4cc | 3917 | struct dwc2_hsotg_ep *hs_ep = our_ep(ep); |
941fcce4 | 3918 | struct dwc2_hsotg *hsotg = hs_ep->parent; |
5b7d70c6 | 3919 | unsigned long flags; |
ca4c55ad | 3920 | unsigned int index = hs_ep->index; |
5b7d70c6 BD |
3921 | u32 epctrl_reg; |
3922 | u32 epctrl; | |
3923 | u32 mps; | |
ee2c40de | 3924 | u32 mc; |
837e9f00 | 3925 | u32 mask; |
ca4c55ad MYK |
3926 | unsigned int dir_in; |
3927 | unsigned int i, val, size; | |
19c190f9 | 3928 | int ret = 0; |
729cac69 | 3929 | unsigned char ep_type; |
54f37f56 | 3930 | int desc_num; |
5b7d70c6 BD |
3931 | |
3932 | dev_dbg(hsotg->dev, | |
3933 | "%s: ep %s: a 0x%02x, attr 0x%02x, mps 0x%04x, intr %d\n", | |
3934 | __func__, ep->name, desc->bEndpointAddress, desc->bmAttributes, | |
3935 | desc->wMaxPacketSize, desc->bInterval); | |
3936 | ||
3937 | /* not to be called for EP0 */ | |
8c3d6092 VA |
3938 | if (index == 0) { |
3939 | dev_err(hsotg->dev, "%s: called for EP 0\n", __func__); | |
3940 | return -EINVAL; | |
3941 | } | |
5b7d70c6 BD |
3942 | |
3943 | dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0; | |
3944 | if (dir_in != hs_ep->dir_in) { | |
3945 | dev_err(hsotg->dev, "%s: direction mismatch!\n", __func__); | |
3946 | return -EINVAL; | |
3947 | } | |
3948 | ||
729cac69 | 3949 | ep_type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
29cc8897 | 3950 | mps = usb_endpoint_maxp(desc); |
ee2c40de | 3951 | mc = usb_endpoint_maxp_mult(desc); |
5b7d70c6 | 3952 | |
729cac69 MH |
3953 | /* ISOC IN in DDMA supported bInterval up to 10 */ |
3954 | if (using_desc_dma(hsotg) && ep_type == USB_ENDPOINT_XFER_ISOC && | |
3955 | dir_in && desc->bInterval > 10) { | |
3956 | dev_err(hsotg->dev, | |
3957 | "%s: ISOC IN, DDMA: bInterval>10 not supported!\n", __func__); | |
3958 | return -EINVAL; | |
3959 | } | |
3960 | ||
3961 | /* High bandwidth ISOC OUT in DDMA not supported */ | |
3962 | if (using_desc_dma(hsotg) && ep_type == USB_ENDPOINT_XFER_ISOC && | |
3963 | !dir_in && mc > 1) { | |
3964 | dev_err(hsotg->dev, | |
3965 | "%s: ISOC OUT, DDMA: HB not supported!\n", __func__); | |
3966 | return -EINVAL; | |
3967 | } | |
3968 | ||
1f91b4cc | 3969 | /* note, we handle this here instead of dwc2_hsotg_set_ep_maxpacket */ |
5b7d70c6 | 3970 | |
94cb8fd6 | 3971 | epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index); |
f25c42b8 | 3972 | epctrl = dwc2_readl(hsotg, epctrl_reg); |
5b7d70c6 BD |
3973 | |
3974 | dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x from 0x%08x\n", | |
3975 | __func__, epctrl, epctrl_reg); | |
3976 | ||
54f37f56 MH |
3977 | if (using_desc_dma(hsotg) && ep_type == USB_ENDPOINT_XFER_ISOC) |
3978 | desc_num = MAX_DMA_DESC_NUM_HS_ISOC; | |
3979 | else | |
3980 | desc_num = MAX_DMA_DESC_NUM_GENERIC; | |
3981 | ||
5f54c54b | 3982 | /* Allocate DMA descriptor chain for non-ctrl endpoints */ |
9383e084 VM |
3983 | if (using_desc_dma(hsotg) && !hs_ep->desc_list) { |
3984 | hs_ep->desc_list = dmam_alloc_coherent(hsotg->dev, | |
54f37f56 | 3985 | desc_num * sizeof(struct dwc2_dma_desc), |
86e881e7 | 3986 | &hs_ep->desc_list_dma, GFP_ATOMIC); |
5f54c54b VA |
3987 | if (!hs_ep->desc_list) { |
3988 | ret = -ENOMEM; | |
3989 | goto error2; | |
3990 | } | |
3991 | } | |
3992 | ||
22258f49 | 3993 | spin_lock_irqsave(&hsotg->lock, flags); |
5b7d70c6 | 3994 | |
47a1685f DN |
3995 | epctrl &= ~(DXEPCTL_EPTYPE_MASK | DXEPCTL_MPS_MASK); |
3996 | epctrl |= DXEPCTL_MPS(mps); | |
5b7d70c6 | 3997 | |
8b9bc460 LM |
3998 | /* |
3999 | * mark the endpoint as active, otherwise the core may ignore | |
4000 | * transactions entirely for this endpoint | |
4001 | */ | |
47a1685f | 4002 | epctrl |= DXEPCTL_USBACTEP; |
5b7d70c6 | 4003 | |
5b7d70c6 | 4004 | /* update the endpoint state */ |
ee2c40de | 4005 | dwc2_hsotg_set_ep_maxpacket(hsotg, hs_ep->index, mps, mc, dir_in); |
5b7d70c6 BD |
4006 | |
4007 | /* default, set to non-periodic */ | |
1479e841 | 4008 | hs_ep->isochronous = 0; |
5b7d70c6 | 4009 | hs_ep->periodic = 0; |
a18ed7b0 | 4010 | hs_ep->halted = 0; |
1479e841 | 4011 | hs_ep->interval = desc->bInterval; |
4fca54aa | 4012 | |
729cac69 | 4013 | switch (ep_type) { |
5b7d70c6 | 4014 | case USB_ENDPOINT_XFER_ISOC: |
47a1685f DN |
4015 | epctrl |= DXEPCTL_EPTYPE_ISO; |
4016 | epctrl |= DXEPCTL_SETEVENFR; | |
1479e841 | 4017 | hs_ep->isochronous = 1; |
142bd33f | 4018 | hs_ep->interval = 1 << (desc->bInterval - 1); |
837e9f00 | 4019 | hs_ep->target_frame = TARGET_FRAME_INITIAL; |
ab7d2192 | 4020 | hs_ep->next_desc = 0; |
729cac69 | 4021 | hs_ep->compl_desc = 0; |
837e9f00 | 4022 | if (dir_in) { |
1479e841 | 4023 | hs_ep->periodic = 1; |
f25c42b8 | 4024 | mask = dwc2_readl(hsotg, DIEPMSK); |
837e9f00 | 4025 | mask |= DIEPMSK_NAKMSK; |
f25c42b8 | 4026 | dwc2_writel(hsotg, mask, DIEPMSK); |
837e9f00 | 4027 | } else { |
f25c42b8 | 4028 | mask = dwc2_readl(hsotg, DOEPMSK); |
837e9f00 | 4029 | mask |= DOEPMSK_OUTTKNEPDISMSK; |
f25c42b8 | 4030 | dwc2_writel(hsotg, mask, DOEPMSK); |
837e9f00 | 4031 | } |
1479e841 | 4032 | break; |
5b7d70c6 BD |
4033 | |
4034 | case USB_ENDPOINT_XFER_BULK: | |
47a1685f | 4035 | epctrl |= DXEPCTL_EPTYPE_BULK; |
5b7d70c6 BD |
4036 | break; |
4037 | ||
4038 | case USB_ENDPOINT_XFER_INT: | |
b203d0a2 | 4039 | if (dir_in) |
5b7d70c6 | 4040 | hs_ep->periodic = 1; |
5b7d70c6 | 4041 | |
142bd33f VM |
4042 | if (hsotg->gadget.speed == USB_SPEED_HIGH) |
4043 | hs_ep->interval = 1 << (desc->bInterval - 1); | |
4044 | ||
47a1685f | 4045 | epctrl |= DXEPCTL_EPTYPE_INTERRUPT; |
5b7d70c6 BD |
4046 | break; |
4047 | ||
4048 | case USB_ENDPOINT_XFER_CONTROL: | |
47a1685f | 4049 | epctrl |= DXEPCTL_EPTYPE_CONTROL; |
5b7d70c6 BD |
4050 | break; |
4051 | } | |
4052 | ||
8b9bc460 LM |
4053 | /* |
4054 | * if the hardware has dedicated fifos, we must give each IN EP | |
10aebc77 BD |
4055 | * a unique tx-fifo even if it is non-periodic. |
4056 | */ | |
21f3bb52 | 4057 | if (dir_in && hsotg->dedicated_fifos) { |
ca4c55ad MYK |
4058 | u32 fifo_index = 0; |
4059 | u32 fifo_size = UINT_MAX; | |
9da51974 JY |
4060 | |
4061 | size = hs_ep->ep.maxpacket * hs_ep->mc; | |
5f2196bd | 4062 | for (i = 1; i < hsotg->num_of_eps; ++i) { |
9da51974 | 4063 | if (hsotg->fifo_map & (1 << i)) |
b203d0a2 | 4064 | continue; |
f25c42b8 | 4065 | val = dwc2_readl(hsotg, DPTXFSIZN(i)); |
9da51974 | 4066 | val = (val >> FIFOSIZE_DEPTH_SHIFT) * 4; |
b203d0a2 RB |
4067 | if (val < size) |
4068 | continue; | |
ca4c55ad MYK |
4069 | /* Search for smallest acceptable fifo */ |
4070 | if (val < fifo_size) { | |
4071 | fifo_size = val; | |
4072 | fifo_index = i; | |
4073 | } | |
b203d0a2 | 4074 | } |
ca4c55ad | 4075 | if (!fifo_index) { |
5f2196bd MYK |
4076 | dev_err(hsotg->dev, |
4077 | "%s: No suitable fifo found\n", __func__); | |
b585a48b | 4078 | ret = -ENOMEM; |
5f54c54b | 4079 | goto error1; |
b585a48b | 4080 | } |
97311c8f | 4081 | epctrl &= ~(DXEPCTL_TXFNUM_LIMIT << DXEPCTL_TXFNUM_SHIFT); |
ca4c55ad MYK |
4082 | hsotg->fifo_map |= 1 << fifo_index; |
4083 | epctrl |= DXEPCTL_TXFNUM(fifo_index); | |
4084 | hs_ep->fifo_index = fifo_index; | |
4085 | hs_ep->fifo_size = fifo_size; | |
b203d0a2 | 4086 | } |
10aebc77 | 4087 | |
5b7d70c6 | 4088 | /* for non control endpoints, set PID to D0 */ |
837e9f00 | 4089 | if (index && !hs_ep->isochronous) |
47a1685f | 4090 | epctrl |= DXEPCTL_SETD0PID; |
5b7d70c6 | 4091 | |
5295322a AP |
4092 | /* WA for Full speed ISOC IN in DDMA mode. |
4093 | * By Clear NAK status of EP, core will send ZLP | |
4094 | * to IN token and assert NAK interrupt relying | |
4095 | * on TxFIFO status only | |
4096 | */ | |
4097 | ||
4098 | if (hsotg->gadget.speed == USB_SPEED_FULL && | |
4099 | hs_ep->isochronous && dir_in) { | |
4100 | /* The WA applies only to core versions from 2.72a | |
4101 | * to 4.00a (including both). Also for FS_IOT_1.00a | |
4102 | * and HS_IOT_1.00a. | |
4103 | */ | |
f25c42b8 | 4104 | u32 gsnpsid = dwc2_readl(hsotg, GSNPSID); |
5295322a AP |
4105 | |
4106 | if ((gsnpsid >= DWC2_CORE_REV_2_72a && | |
4107 | gsnpsid <= DWC2_CORE_REV_4_00a) || | |
4108 | gsnpsid == DWC2_FS_IOT_REV_1_00a || | |
4109 | gsnpsid == DWC2_HS_IOT_REV_1_00a) | |
4110 | epctrl |= DXEPCTL_CNAK; | |
4111 | } | |
4112 | ||
5b7d70c6 BD |
4113 | dev_dbg(hsotg->dev, "%s: write DxEPCTL=0x%08x\n", |
4114 | __func__, epctrl); | |
4115 | ||
f25c42b8 | 4116 | dwc2_writel(hsotg, epctrl, epctrl_reg); |
5b7d70c6 | 4117 | dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x\n", |
f25c42b8 | 4118 | __func__, dwc2_readl(hsotg, epctrl_reg)); |
5b7d70c6 BD |
4119 | |
4120 | /* enable the endpoint interrupt */ | |
1f91b4cc | 4121 | dwc2_hsotg_ctrl_epint(hsotg, index, dir_in, 1); |
5b7d70c6 | 4122 | |
5f54c54b | 4123 | error1: |
22258f49 | 4124 | spin_unlock_irqrestore(&hsotg->lock, flags); |
5f54c54b VA |
4125 | |
4126 | error2: | |
4127 | if (ret && using_desc_dma(hsotg) && hs_ep->desc_list) { | |
54f37f56 | 4128 | dmam_free_coherent(hsotg->dev, desc_num * |
5f54c54b VA |
4129 | sizeof(struct dwc2_dma_desc), |
4130 | hs_ep->desc_list, hs_ep->desc_list_dma); | |
4131 | hs_ep->desc_list = NULL; | |
4132 | } | |
4133 | ||
19c190f9 | 4134 | return ret; |
5b7d70c6 BD |
4135 | } |
4136 | ||
8b9bc460 | 4137 | /** |
1f91b4cc | 4138 | * dwc2_hsotg_ep_disable - disable given endpoint |
8b9bc460 LM |
4139 | * @ep: The endpoint to disable. |
4140 | */ | |
1f91b4cc | 4141 | static int dwc2_hsotg_ep_disable(struct usb_ep *ep) |
5b7d70c6 | 4142 | { |
1f91b4cc | 4143 | struct dwc2_hsotg_ep *hs_ep = our_ep(ep); |
941fcce4 | 4144 | struct dwc2_hsotg *hsotg = hs_ep->parent; |
5b7d70c6 BD |
4145 | int dir_in = hs_ep->dir_in; |
4146 | int index = hs_ep->index; | |
5b7d70c6 BD |
4147 | u32 epctrl_reg; |
4148 | u32 ctrl; | |
4149 | ||
1e011293 | 4150 | dev_dbg(hsotg->dev, "%s(ep %p)\n", __func__, ep); |
5b7d70c6 | 4151 | |
c6f5c050 | 4152 | if (ep == &hsotg->eps_out[0]->ep) { |
5b7d70c6 BD |
4153 | dev_err(hsotg->dev, "%s: called for ep0\n", __func__); |
4154 | return -EINVAL; | |
9b481092 JS |
4155 | } |
4156 | ||
4157 | if (hsotg->op_state != OTG_STATE_B_PERIPHERAL) { | |
4158 | dev_err(hsotg->dev, "%s: called in host mode?\n", __func__); | |
4159 | return -EINVAL; | |
5b7d70c6 BD |
4160 | } |
4161 | ||
94cb8fd6 | 4162 | epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index); |
5b7d70c6 | 4163 | |
f25c42b8 | 4164 | ctrl = dwc2_readl(hsotg, epctrl_reg); |
a4f82771 VA |
4165 | |
4166 | if (ctrl & DXEPCTL_EPENA) | |
4167 | dwc2_hsotg_ep_stop_xfr(hsotg, hs_ep); | |
4168 | ||
47a1685f DN |
4169 | ctrl &= ~DXEPCTL_EPENA; |
4170 | ctrl &= ~DXEPCTL_USBACTEP; | |
4171 | ctrl |= DXEPCTL_SNAK; | |
5b7d70c6 BD |
4172 | |
4173 | dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl); | |
f25c42b8 | 4174 | dwc2_writel(hsotg, ctrl, epctrl_reg); |
5b7d70c6 BD |
4175 | |
4176 | /* disable endpoint interrupts */ | |
1f91b4cc | 4177 | dwc2_hsotg_ctrl_epint(hsotg, hs_ep->index, hs_ep->dir_in, 0); |
5b7d70c6 | 4178 | |
1141ea01 MYK |
4179 | /* terminate all requests with shutdown */ |
4180 | kill_all_requests(hsotg, hs_ep, -ESHUTDOWN); | |
4181 | ||
1c07b20e RB |
4182 | hsotg->fifo_map &= ~(1 << hs_ep->fifo_index); |
4183 | hs_ep->fifo_index = 0; | |
4184 | hs_ep->fifo_size = 0; | |
4185 | ||
5b7d70c6 BD |
4186 | return 0; |
4187 | } | |
4188 | ||
4fe4f9fe MH |
4189 | static int dwc2_hsotg_ep_disable_lock(struct usb_ep *ep) |
4190 | { | |
4191 | struct dwc2_hsotg_ep *hs_ep = our_ep(ep); | |
4192 | struct dwc2_hsotg *hsotg = hs_ep->parent; | |
4193 | unsigned long flags; | |
4194 | int ret; | |
4195 | ||
4196 | spin_lock_irqsave(&hsotg->lock, flags); | |
4197 | ret = dwc2_hsotg_ep_disable(ep); | |
4198 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4199 | return ret; | |
4200 | } | |
4201 | ||
5b7d70c6 BD |
4202 | /** |
4203 | * on_list - check request is on the given endpoint | |
4204 | * @ep: The endpoint to check. | |
4205 | * @test: The request to test if it is on the endpoint. | |
8b9bc460 | 4206 | */ |
1f91b4cc | 4207 | static bool on_list(struct dwc2_hsotg_ep *ep, struct dwc2_hsotg_req *test) |
5b7d70c6 | 4208 | { |
1f91b4cc | 4209 | struct dwc2_hsotg_req *req, *treq; |
5b7d70c6 BD |
4210 | |
4211 | list_for_each_entry_safe(req, treq, &ep->queue, queue) { | |
4212 | if (req == test) | |
4213 | return true; | |
4214 | } | |
4215 | ||
4216 | return false; | |
4217 | } | |
4218 | ||
8b9bc460 | 4219 | /** |
1f91b4cc | 4220 | * dwc2_hsotg_ep_dequeue - dequeue given endpoint |
8b9bc460 LM |
4221 | * @ep: The endpoint to dequeue. |
4222 | * @req: The request to be removed from a queue. | |
4223 | */ | |
1f91b4cc | 4224 | static int dwc2_hsotg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) |
5b7d70c6 | 4225 | { |
1f91b4cc FB |
4226 | struct dwc2_hsotg_req *hs_req = our_req(req); |
4227 | struct dwc2_hsotg_ep *hs_ep = our_ep(ep); | |
941fcce4 | 4228 | struct dwc2_hsotg *hs = hs_ep->parent; |
5b7d70c6 BD |
4229 | unsigned long flags; |
4230 | ||
1e011293 | 4231 | dev_dbg(hs->dev, "ep_dequeue(%p,%p)\n", ep, req); |
5b7d70c6 | 4232 | |
22258f49 | 4233 | spin_lock_irqsave(&hs->lock, flags); |
5b7d70c6 BD |
4234 | |
4235 | if (!on_list(hs_ep, hs_req)) { | |
22258f49 | 4236 | spin_unlock_irqrestore(&hs->lock, flags); |
5b7d70c6 BD |
4237 | return -EINVAL; |
4238 | } | |
4239 | ||
c524dd5f MYK |
4240 | /* Dequeue already started request */ |
4241 | if (req == &hs_ep->req->req) | |
4242 | dwc2_hsotg_ep_stop_xfr(hs, hs_ep); | |
4243 | ||
1f91b4cc | 4244 | dwc2_hsotg_complete_request(hs, hs_ep, hs_req, -ECONNRESET); |
22258f49 | 4245 | spin_unlock_irqrestore(&hs->lock, flags); |
5b7d70c6 BD |
4246 | |
4247 | return 0; | |
4248 | } | |
4249 | ||
8b9bc460 | 4250 | /** |
1f91b4cc | 4251 | * dwc2_hsotg_ep_sethalt - set halt on a given endpoint |
8b9bc460 LM |
4252 | * @ep: The endpoint to set halt. |
4253 | * @value: Set or unset the halt. | |
51da43b5 VA |
4254 | * @now: If true, stall the endpoint now. Otherwise return -EAGAIN if |
4255 | * the endpoint is busy processing requests. | |
4256 | * | |
4257 | * We need to stall the endpoint immediately if request comes from set_feature | |
4258 | * protocol command handler. | |
8b9bc460 | 4259 | */ |
51da43b5 | 4260 | static int dwc2_hsotg_ep_sethalt(struct usb_ep *ep, int value, bool now) |
5b7d70c6 | 4261 | { |
1f91b4cc | 4262 | struct dwc2_hsotg_ep *hs_ep = our_ep(ep); |
941fcce4 | 4263 | struct dwc2_hsotg *hs = hs_ep->parent; |
5b7d70c6 | 4264 | int index = hs_ep->index; |
5b7d70c6 BD |
4265 | u32 epreg; |
4266 | u32 epctl; | |
9c39ddc6 | 4267 | u32 xfertype; |
5b7d70c6 BD |
4268 | |
4269 | dev_info(hs->dev, "%s(ep %p %s, %d)\n", __func__, ep, ep->name, value); | |
4270 | ||
c9f721b2 RB |
4271 | if (index == 0) { |
4272 | if (value) | |
1f91b4cc | 4273 | dwc2_hsotg_stall_ep0(hs); |
c9f721b2 RB |
4274 | else |
4275 | dev_warn(hs->dev, | |
4276 | "%s: can't clear halt on ep0\n", __func__); | |
4277 | return 0; | |
4278 | } | |
4279 | ||
15186f10 VA |
4280 | if (hs_ep->isochronous) { |
4281 | dev_err(hs->dev, "%s is Isochronous Endpoint\n", ep->name); | |
4282 | return -EINVAL; | |
4283 | } | |
4284 | ||
51da43b5 VA |
4285 | if (!now && value && !list_empty(&hs_ep->queue)) { |
4286 | dev_dbg(hs->dev, "%s request is pending, cannot halt\n", | |
4287 | ep->name); | |
4288 | return -EAGAIN; | |
4289 | } | |
4290 | ||
c6f5c050 MYK |
4291 | if (hs_ep->dir_in) { |
4292 | epreg = DIEPCTL(index); | |
f25c42b8 | 4293 | epctl = dwc2_readl(hs, epreg); |
c6f5c050 MYK |
4294 | |
4295 | if (value) { | |
5a350d53 | 4296 | epctl |= DXEPCTL_STALL | DXEPCTL_SNAK; |
c6f5c050 MYK |
4297 | if (epctl & DXEPCTL_EPENA) |
4298 | epctl |= DXEPCTL_EPDIS; | |
4299 | } else { | |
4300 | epctl &= ~DXEPCTL_STALL; | |
4301 | xfertype = epctl & DXEPCTL_EPTYPE_MASK; | |
4302 | if (xfertype == DXEPCTL_EPTYPE_BULK || | |
9da51974 | 4303 | xfertype == DXEPCTL_EPTYPE_INTERRUPT) |
77b6200e | 4304 | epctl |= DXEPCTL_SETD0PID; |
c6f5c050 | 4305 | } |
f25c42b8 | 4306 | dwc2_writel(hs, epctl, epreg); |
9c39ddc6 | 4307 | } else { |
c6f5c050 | 4308 | epreg = DOEPCTL(index); |
f25c42b8 | 4309 | epctl = dwc2_readl(hs, epreg); |
5b7d70c6 | 4310 | |
34c0887f | 4311 | if (value) { |
c6f5c050 | 4312 | epctl |= DXEPCTL_STALL; |
34c0887f | 4313 | } else { |
c6f5c050 MYK |
4314 | epctl &= ~DXEPCTL_STALL; |
4315 | xfertype = epctl & DXEPCTL_EPTYPE_MASK; | |
4316 | if (xfertype == DXEPCTL_EPTYPE_BULK || | |
9da51974 | 4317 | xfertype == DXEPCTL_EPTYPE_INTERRUPT) |
77b6200e | 4318 | epctl |= DXEPCTL_SETD0PID; |
c6f5c050 | 4319 | } |
f25c42b8 | 4320 | dwc2_writel(hs, epctl, epreg); |
9c39ddc6 | 4321 | } |
5b7d70c6 | 4322 | |
a18ed7b0 RB |
4323 | hs_ep->halted = value; |
4324 | ||
5b7d70c6 BD |
4325 | return 0; |
4326 | } | |
4327 | ||
5ad1d316 | 4328 | /** |
1f91b4cc | 4329 | * dwc2_hsotg_ep_sethalt_lock - set halt on a given endpoint with lock held |
5ad1d316 LM |
4330 | * @ep: The endpoint to set halt. |
4331 | * @value: Set or unset the halt. | |
4332 | */ | |
1f91b4cc | 4333 | static int dwc2_hsotg_ep_sethalt_lock(struct usb_ep *ep, int value) |
5ad1d316 | 4334 | { |
1f91b4cc | 4335 | struct dwc2_hsotg_ep *hs_ep = our_ep(ep); |
941fcce4 | 4336 | struct dwc2_hsotg *hs = hs_ep->parent; |
5ad1d316 LM |
4337 | unsigned long flags = 0; |
4338 | int ret = 0; | |
4339 | ||
4340 | spin_lock_irqsave(&hs->lock, flags); | |
51da43b5 | 4341 | ret = dwc2_hsotg_ep_sethalt(ep, value, false); |
5ad1d316 LM |
4342 | spin_unlock_irqrestore(&hs->lock, flags); |
4343 | ||
4344 | return ret; | |
4345 | } | |
4346 | ||
ebce561a | 4347 | static const struct usb_ep_ops dwc2_hsotg_ep_ops = { |
1f91b4cc | 4348 | .enable = dwc2_hsotg_ep_enable, |
4fe4f9fe | 4349 | .disable = dwc2_hsotg_ep_disable_lock, |
1f91b4cc FB |
4350 | .alloc_request = dwc2_hsotg_ep_alloc_request, |
4351 | .free_request = dwc2_hsotg_ep_free_request, | |
4352 | .queue = dwc2_hsotg_ep_queue_lock, | |
4353 | .dequeue = dwc2_hsotg_ep_dequeue, | |
4354 | .set_halt = dwc2_hsotg_ep_sethalt_lock, | |
25985edc | 4355 | /* note, don't believe we have any call for the fifo routines */ |
5b7d70c6 BD |
4356 | }; |
4357 | ||
8b9bc460 | 4358 | /** |
9da51974 | 4359 | * dwc2_hsotg_init - initialize the usb core |
8b9bc460 LM |
4360 | * @hsotg: The driver state |
4361 | */ | |
1f91b4cc | 4362 | static void dwc2_hsotg_init(struct dwc2_hsotg *hsotg) |
b3f489b2 LM |
4363 | { |
4364 | /* unmask subset of endpoint interrupts */ | |
4365 | ||
f25c42b8 | 4366 | dwc2_writel(hsotg, DIEPMSK_TIMEOUTMSK | DIEPMSK_AHBERRMSK | |
95c8bc36 | 4367 | DIEPMSK_EPDISBLDMSK | DIEPMSK_XFERCOMPLMSK, |
f25c42b8 | 4368 | DIEPMSK); |
b3f489b2 | 4369 | |
f25c42b8 | 4370 | dwc2_writel(hsotg, DOEPMSK_SETUPMSK | DOEPMSK_AHBERRMSK | |
95c8bc36 | 4371 | DOEPMSK_EPDISBLDMSK | DOEPMSK_XFERCOMPLMSK, |
f25c42b8 | 4372 | DOEPMSK); |
b3f489b2 | 4373 | |
f25c42b8 | 4374 | dwc2_writel(hsotg, 0, DAINTMSK); |
b3f489b2 LM |
4375 | |
4376 | /* Be in disconnected state until gadget is registered */ | |
f25c42b8 | 4377 | dwc2_set_bit(hsotg, DCTL, DCTL_SFTDISCON); |
b3f489b2 | 4378 | |
b3f489b2 LM |
4379 | /* setup fifos */ |
4380 | ||
4381 | dev_dbg(hsotg->dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n", | |
f25c42b8 GS |
4382 | dwc2_readl(hsotg, GRXFSIZ), |
4383 | dwc2_readl(hsotg, GNPTXFSIZ)); | |
b3f489b2 | 4384 | |
1f91b4cc | 4385 | dwc2_hsotg_init_fifo(hsotg); |
b3f489b2 | 4386 | |
f5090044 | 4387 | if (using_dma(hsotg)) |
f25c42b8 | 4388 | dwc2_set_bit(hsotg, GAHBCFG, GAHBCFG_DMA_EN); |
b3f489b2 LM |
4389 | } |
4390 | ||
8b9bc460 | 4391 | /** |
1f91b4cc | 4392 | * dwc2_hsotg_udc_start - prepare the udc for work |
8b9bc460 LM |
4393 | * @gadget: The usb gadget state |
4394 | * @driver: The usb gadget driver | |
4395 | * | |
4396 | * Perform initialization to prepare udc device and driver | |
4397 | * to work. | |
4398 | */ | |
1f91b4cc | 4399 | static int dwc2_hsotg_udc_start(struct usb_gadget *gadget, |
9da51974 | 4400 | struct usb_gadget_driver *driver) |
5b7d70c6 | 4401 | { |
941fcce4 | 4402 | struct dwc2_hsotg *hsotg = to_hsotg(gadget); |
5b9451f8 | 4403 | unsigned long flags; |
5b7d70c6 BD |
4404 | int ret; |
4405 | ||
4406 | if (!hsotg) { | |
a023da33 | 4407 | pr_err("%s: called with no device\n", __func__); |
5b7d70c6 BD |
4408 | return -ENODEV; |
4409 | } | |
4410 | ||
4411 | if (!driver) { | |
4412 | dev_err(hsotg->dev, "%s: no driver\n", __func__); | |
4413 | return -EINVAL; | |
4414 | } | |
4415 | ||
7177aed4 | 4416 | if (driver->max_speed < USB_SPEED_FULL) |
5b7d70c6 | 4417 | dev_err(hsotg->dev, "%s: bad speed\n", __func__); |
5b7d70c6 | 4418 | |
f65f0f10 | 4419 | if (!driver->setup) { |
5b7d70c6 BD |
4420 | dev_err(hsotg->dev, "%s: missing entry points\n", __func__); |
4421 | return -EINVAL; | |
4422 | } | |
4423 | ||
4424 | WARN_ON(hsotg->driver); | |
4425 | ||
4426 | driver->driver.bus = NULL; | |
4427 | hsotg->driver = driver; | |
7d7b2292 | 4428 | hsotg->gadget.dev.of_node = hsotg->dev->of_node; |
5b7d70c6 BD |
4429 | hsotg->gadget.speed = USB_SPEED_UNKNOWN; |
4430 | ||
09a75e85 MS |
4431 | if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) { |
4432 | ret = dwc2_lowlevel_hw_enable(hsotg); | |
4433 | if (ret) | |
4434 | goto err; | |
5b7d70c6 BD |
4435 | } |
4436 | ||
f6c01592 GH |
4437 | if (!IS_ERR_OR_NULL(hsotg->uphy)) |
4438 | otg_set_peripheral(hsotg->uphy->otg, &hsotg->gadget); | |
c816c47f | 4439 | |
5b9451f8 | 4440 | spin_lock_irqsave(&hsotg->lock, flags); |
d0f0ac56 JY |
4441 | if (dwc2_hw_is_device(hsotg)) { |
4442 | dwc2_hsotg_init(hsotg); | |
4443 | dwc2_hsotg_core_init_disconnected(hsotg, false); | |
4444 | } | |
4445 | ||
dc6e69e6 | 4446 | hsotg->enabled = 0; |
5b9451f8 MS |
4447 | spin_unlock_irqrestore(&hsotg->lock, flags); |
4448 | ||
10209abe | 4449 | gadget->sg_supported = using_desc_dma(hsotg); |
5b7d70c6 | 4450 | dev_info(hsotg->dev, "bound driver %s\n", driver->driver.name); |
5b9451f8 | 4451 | |
5b7d70c6 BD |
4452 | return 0; |
4453 | ||
4454 | err: | |
4455 | hsotg->driver = NULL; | |
5b7d70c6 BD |
4456 | return ret; |
4457 | } | |
4458 | ||
8b9bc460 | 4459 | /** |
1f91b4cc | 4460 | * dwc2_hsotg_udc_stop - stop the udc |
8b9bc460 | 4461 | * @gadget: The usb gadget state |
8b9bc460 LM |
4462 | * |
4463 | * Stop udc hw block and stay tunned for future transmissions | |
4464 | */ | |
1f91b4cc | 4465 | static int dwc2_hsotg_udc_stop(struct usb_gadget *gadget) |
5b7d70c6 | 4466 | { |
941fcce4 | 4467 | struct dwc2_hsotg *hsotg = to_hsotg(gadget); |
2b19a52c | 4468 | unsigned long flags = 0; |
5b7d70c6 BD |
4469 | int ep; |
4470 | ||
4471 | if (!hsotg) | |
4472 | return -ENODEV; | |
4473 | ||
5b7d70c6 | 4474 | /* all endpoints should be shutdown */ |
c6f5c050 MYK |
4475 | for (ep = 1; ep < hsotg->num_of_eps; ep++) { |
4476 | if (hsotg->eps_in[ep]) | |
4fe4f9fe | 4477 | dwc2_hsotg_ep_disable_lock(&hsotg->eps_in[ep]->ep); |
c6f5c050 | 4478 | if (hsotg->eps_out[ep]) |
4fe4f9fe | 4479 | dwc2_hsotg_ep_disable_lock(&hsotg->eps_out[ep]->ep); |
c6f5c050 | 4480 | } |
5b7d70c6 | 4481 | |
2b19a52c LM |
4482 | spin_lock_irqsave(&hsotg->lock, flags); |
4483 | ||
32805c35 | 4484 | hsotg->driver = NULL; |
5b7d70c6 | 4485 | hsotg->gadget.speed = USB_SPEED_UNKNOWN; |
dc6e69e6 | 4486 | hsotg->enabled = 0; |
5b7d70c6 | 4487 | |
2b19a52c LM |
4488 | spin_unlock_irqrestore(&hsotg->lock, flags); |
4489 | ||
f6c01592 GH |
4490 | if (!IS_ERR_OR_NULL(hsotg->uphy)) |
4491 | otg_set_peripheral(hsotg->uphy->otg, NULL); | |
c816c47f | 4492 | |
09a75e85 MS |
4493 | if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) |
4494 | dwc2_lowlevel_hw_disable(hsotg); | |
5b7d70c6 BD |
4495 | |
4496 | return 0; | |
4497 | } | |
5b7d70c6 | 4498 | |
8b9bc460 | 4499 | /** |
1f91b4cc | 4500 | * dwc2_hsotg_gadget_getframe - read the frame number |
8b9bc460 LM |
4501 | * @gadget: The usb gadget state |
4502 | * | |
4503 | * Read the {micro} frame number | |
4504 | */ | |
1f91b4cc | 4505 | static int dwc2_hsotg_gadget_getframe(struct usb_gadget *gadget) |
5b7d70c6 | 4506 | { |
1f91b4cc | 4507 | return dwc2_hsotg_read_frameno(to_hsotg(gadget)); |
5b7d70c6 BD |
4508 | } |
4509 | ||
a188b689 | 4510 | /** |
1f91b4cc | 4511 | * dwc2_hsotg_pullup - connect/disconnect the USB PHY |
a188b689 LM |
4512 | * @gadget: The usb gadget state |
4513 | * @is_on: Current state of the USB PHY | |
4514 | * | |
4515 | * Connect/Disconnect the USB PHY pullup | |
4516 | */ | |
1f91b4cc | 4517 | static int dwc2_hsotg_pullup(struct usb_gadget *gadget, int is_on) |
a188b689 | 4518 | { |
941fcce4 | 4519 | struct dwc2_hsotg *hsotg = to_hsotg(gadget); |
a188b689 LM |
4520 | unsigned long flags = 0; |
4521 | ||
77ba9119 | 4522 | dev_dbg(hsotg->dev, "%s: is_on: %d op_state: %d\n", __func__, is_on, |
9da51974 | 4523 | hsotg->op_state); |
77ba9119 GH |
4524 | |
4525 | /* Don't modify pullup state while in host mode */ | |
4526 | if (hsotg->op_state != OTG_STATE_B_PERIPHERAL) { | |
4527 | hsotg->enabled = is_on; | |
4528 | return 0; | |
4529 | } | |
a188b689 LM |
4530 | |
4531 | spin_lock_irqsave(&hsotg->lock, flags); | |
4532 | if (is_on) { | |
dc6e69e6 | 4533 | hsotg->enabled = 1; |
1f91b4cc | 4534 | dwc2_hsotg_core_init_disconnected(hsotg, false); |
66e77a24 RK |
4535 | /* Enable ACG feature in device mode,if supported */ |
4536 | dwc2_enable_acg(hsotg); | |
1f91b4cc | 4537 | dwc2_hsotg_core_connect(hsotg); |
a188b689 | 4538 | } else { |
1f91b4cc FB |
4539 | dwc2_hsotg_core_disconnect(hsotg); |
4540 | dwc2_hsotg_disconnect(hsotg); | |
dc6e69e6 | 4541 | hsotg->enabled = 0; |
a188b689 LM |
4542 | } |
4543 | ||
4544 | hsotg->gadget.speed = USB_SPEED_UNKNOWN; | |
4545 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4546 | ||
4547 | return 0; | |
4548 | } | |
4549 | ||
1f91b4cc | 4550 | static int dwc2_hsotg_vbus_session(struct usb_gadget *gadget, int is_active) |
83d98223 GH |
4551 | { |
4552 | struct dwc2_hsotg *hsotg = to_hsotg(gadget); | |
4553 | unsigned long flags; | |
4554 | ||
4555 | dev_dbg(hsotg->dev, "%s: is_active: %d\n", __func__, is_active); | |
4556 | spin_lock_irqsave(&hsotg->lock, flags); | |
4557 | ||
61f7223b | 4558 | /* |
41ba9b9b | 4559 | * If controller is hibernated, it must exit from power_down |
61f7223b GH |
4560 | * before being initialized / de-initialized |
4561 | */ | |
4562 | if (hsotg->lx_state == DWC2_L2) | |
41ba9b9b | 4563 | dwc2_exit_partial_power_down(hsotg, false); |
61f7223b | 4564 | |
83d98223 | 4565 | if (is_active) { |
cd0e641c | 4566 | hsotg->op_state = OTG_STATE_B_PERIPHERAL; |
065d3931 | 4567 | |
1f91b4cc | 4568 | dwc2_hsotg_core_init_disconnected(hsotg, false); |
66e77a24 RK |
4569 | if (hsotg->enabled) { |
4570 | /* Enable ACG feature in device mode,if supported */ | |
4571 | dwc2_enable_acg(hsotg); | |
1f91b4cc | 4572 | dwc2_hsotg_core_connect(hsotg); |
66e77a24 | 4573 | } |
83d98223 | 4574 | } else { |
1f91b4cc FB |
4575 | dwc2_hsotg_core_disconnect(hsotg); |
4576 | dwc2_hsotg_disconnect(hsotg); | |
83d98223 GH |
4577 | } |
4578 | ||
4579 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
4580 | return 0; | |
4581 | } | |
4582 | ||
596d696a | 4583 | /** |
1f91b4cc | 4584 | * dwc2_hsotg_vbus_draw - report bMaxPower field |
596d696a GH |
4585 | * @gadget: The usb gadget state |
4586 | * @mA: Amount of current | |
4587 | * | |
4588 | * Report how much power the device may consume to the phy. | |
4589 | */ | |
9da51974 | 4590 | static int dwc2_hsotg_vbus_draw(struct usb_gadget *gadget, unsigned int mA) |
596d696a GH |
4591 | { |
4592 | struct dwc2_hsotg *hsotg = to_hsotg(gadget); | |
4593 | ||
4594 | if (IS_ERR_OR_NULL(hsotg->uphy)) | |
4595 | return -ENOTSUPP; | |
4596 | return usb_phy_set_power(hsotg->uphy, mA); | |
4597 | } | |
4598 | ||
1f91b4cc FB |
4599 | static const struct usb_gadget_ops dwc2_hsotg_gadget_ops = { |
4600 | .get_frame = dwc2_hsotg_gadget_getframe, | |
4601 | .udc_start = dwc2_hsotg_udc_start, | |
4602 | .udc_stop = dwc2_hsotg_udc_stop, | |
4603 | .pullup = dwc2_hsotg_pullup, | |
4604 | .vbus_session = dwc2_hsotg_vbus_session, | |
4605 | .vbus_draw = dwc2_hsotg_vbus_draw, | |
5b7d70c6 BD |
4606 | }; |
4607 | ||
4608 | /** | |
1f91b4cc | 4609 | * dwc2_hsotg_initep - initialise a single endpoint |
5b7d70c6 BD |
4610 | * @hsotg: The device state. |
4611 | * @hs_ep: The endpoint to be initialised. | |
4612 | * @epnum: The endpoint number | |
6fb914d7 | 4613 | * @dir_in: True if direction is in. |
5b7d70c6 BD |
4614 | * |
4615 | * Initialise the given endpoint (as part of the probe and device state | |
4616 | * creation) to give to the gadget driver. Setup the endpoint name, any | |
4617 | * direction information and other state that may be required. | |
4618 | */ | |
1f91b4cc | 4619 | static void dwc2_hsotg_initep(struct dwc2_hsotg *hsotg, |
9da51974 | 4620 | struct dwc2_hsotg_ep *hs_ep, |
c6f5c050 MYK |
4621 | int epnum, |
4622 | bool dir_in) | |
5b7d70c6 | 4623 | { |
5b7d70c6 BD |
4624 | char *dir; |
4625 | ||
4626 | if (epnum == 0) | |
4627 | dir = ""; | |
c6f5c050 | 4628 | else if (dir_in) |
5b7d70c6 | 4629 | dir = "in"; |
c6f5c050 MYK |
4630 | else |
4631 | dir = "out"; | |
5b7d70c6 | 4632 | |
c6f5c050 | 4633 | hs_ep->dir_in = dir_in; |
5b7d70c6 BD |
4634 | hs_ep->index = epnum; |
4635 | ||
4636 | snprintf(hs_ep->name, sizeof(hs_ep->name), "ep%d%s", epnum, dir); | |
4637 | ||
4638 | INIT_LIST_HEAD(&hs_ep->queue); | |
4639 | INIT_LIST_HEAD(&hs_ep->ep.ep_list); | |
4640 | ||
5b7d70c6 BD |
4641 | /* add to the list of endpoints known by the gadget driver */ |
4642 | if (epnum) | |
4643 | list_add_tail(&hs_ep->ep.ep_list, &hsotg->gadget.ep_list); | |
4644 | ||
4645 | hs_ep->parent = hsotg; | |
4646 | hs_ep->ep.name = hs_ep->name; | |
38e9002b VM |
4647 | |
4648 | if (hsotg->params.speed == DWC2_SPEED_PARAM_LOW) | |
4649 | usb_ep_set_maxpacket_limit(&hs_ep->ep, 8); | |
4650 | else | |
4651 | usb_ep_set_maxpacket_limit(&hs_ep->ep, | |
4652 | epnum ? 1024 : EP0_MPS_LIMIT); | |
1f91b4cc | 4653 | hs_ep->ep.ops = &dwc2_hsotg_ep_ops; |
5b7d70c6 | 4654 | |
2954522f RB |
4655 | if (epnum == 0) { |
4656 | hs_ep->ep.caps.type_control = true; | |
4657 | } else { | |
38e9002b VM |
4658 | if (hsotg->params.speed != DWC2_SPEED_PARAM_LOW) { |
4659 | hs_ep->ep.caps.type_iso = true; | |
4660 | hs_ep->ep.caps.type_bulk = true; | |
4661 | } | |
2954522f RB |
4662 | hs_ep->ep.caps.type_int = true; |
4663 | } | |
4664 | ||
4665 | if (dir_in) | |
4666 | hs_ep->ep.caps.dir_in = true; | |
4667 | else | |
4668 | hs_ep->ep.caps.dir_out = true; | |
4669 | ||
8b9bc460 LM |
4670 | /* |
4671 | * if we're using dma, we need to set the next-endpoint pointer | |
5b7d70c6 BD |
4672 | * to be something valid. |
4673 | */ | |
4674 | ||
4675 | if (using_dma(hsotg)) { | |
47a1685f | 4676 | u32 next = DXEPCTL_NEXTEP((epnum + 1) % 15); |
9da51974 | 4677 | |
c6f5c050 | 4678 | if (dir_in) |
f25c42b8 | 4679 | dwc2_writel(hsotg, next, DIEPCTL(epnum)); |
c6f5c050 | 4680 | else |
f25c42b8 | 4681 | dwc2_writel(hsotg, next, DOEPCTL(epnum)); |
5b7d70c6 BD |
4682 | } |
4683 | } | |
4684 | ||
b3f489b2 | 4685 | /** |
1f91b4cc | 4686 | * dwc2_hsotg_hw_cfg - read HW configuration registers |
6fb914d7 | 4687 | * @hsotg: Programming view of the DWC_otg controller |
b3f489b2 LM |
4688 | * |
4689 | * Read the USB core HW configuration registers | |
4690 | */ | |
1f91b4cc | 4691 | static int dwc2_hsotg_hw_cfg(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 4692 | { |
c6f5c050 MYK |
4693 | u32 cfg; |
4694 | u32 ep_type; | |
4695 | u32 i; | |
4696 | ||
b3f489b2 | 4697 | /* check hardware configuration */ |
5b7d70c6 | 4698 | |
43e90349 JY |
4699 | hsotg->num_of_eps = hsotg->hw_params.num_dev_ep; |
4700 | ||
c6f5c050 MYK |
4701 | /* Add ep0 */ |
4702 | hsotg->num_of_eps++; | |
10aebc77 | 4703 | |
b98866c2 JY |
4704 | hsotg->eps_in[0] = devm_kzalloc(hsotg->dev, |
4705 | sizeof(struct dwc2_hsotg_ep), | |
4706 | GFP_KERNEL); | |
c6f5c050 MYK |
4707 | if (!hsotg->eps_in[0]) |
4708 | return -ENOMEM; | |
1f91b4cc | 4709 | /* Same dwc2_hsotg_ep is used in both directions for ep0 */ |
c6f5c050 MYK |
4710 | hsotg->eps_out[0] = hsotg->eps_in[0]; |
4711 | ||
43e90349 | 4712 | cfg = hsotg->hw_params.dev_ep_dirs; |
251a17f5 | 4713 | for (i = 1, cfg >>= 2; i < hsotg->num_of_eps; i++, cfg >>= 2) { |
c6f5c050 MYK |
4714 | ep_type = cfg & 3; |
4715 | /* Direction in or both */ | |
4716 | if (!(ep_type & 2)) { | |
4717 | hsotg->eps_in[i] = devm_kzalloc(hsotg->dev, | |
1f91b4cc | 4718 | sizeof(struct dwc2_hsotg_ep), GFP_KERNEL); |
c6f5c050 MYK |
4719 | if (!hsotg->eps_in[i]) |
4720 | return -ENOMEM; | |
4721 | } | |
4722 | /* Direction out or both */ | |
4723 | if (!(ep_type & 1)) { | |
4724 | hsotg->eps_out[i] = devm_kzalloc(hsotg->dev, | |
1f91b4cc | 4725 | sizeof(struct dwc2_hsotg_ep), GFP_KERNEL); |
c6f5c050 MYK |
4726 | if (!hsotg->eps_out[i]) |
4727 | return -ENOMEM; | |
4728 | } | |
4729 | } | |
4730 | ||
43e90349 JY |
4731 | hsotg->fifo_mem = hsotg->hw_params.total_fifo_size; |
4732 | hsotg->dedicated_fifos = hsotg->hw_params.en_multiple_tx_fifo; | |
10aebc77 | 4733 | |
cff9eb75 MS |
4734 | dev_info(hsotg->dev, "EPs: %d, %s fifos, %d entries in SPRAM\n", |
4735 | hsotg->num_of_eps, | |
4736 | hsotg->dedicated_fifos ? "dedicated" : "shared", | |
4737 | hsotg->fifo_mem); | |
c6f5c050 | 4738 | return 0; |
5b7d70c6 BD |
4739 | } |
4740 | ||
8b9bc460 | 4741 | /** |
1f91b4cc | 4742 | * dwc2_hsotg_dump - dump state of the udc |
6fb914d7 GT |
4743 | * @hsotg: Programming view of the DWC_otg controller |
4744 | * | |
8b9bc460 | 4745 | */ |
1f91b4cc | 4746 | static void dwc2_hsotg_dump(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 4747 | { |
83a01804 | 4748 | #ifdef DEBUG |
5b7d70c6 | 4749 | struct device *dev = hsotg->dev; |
5b7d70c6 BD |
4750 | u32 val; |
4751 | int idx; | |
4752 | ||
4753 | dev_info(dev, "DCFG=0x%08x, DCTL=0x%08x, DIEPMSK=%08x\n", | |
f25c42b8 GS |
4754 | dwc2_readl(hsotg, DCFG), dwc2_readl(hsotg, DCTL), |
4755 | dwc2_readl(hsotg, DIEPMSK)); | |
5b7d70c6 | 4756 | |
f889f23d | 4757 | dev_info(dev, "GAHBCFG=0x%08x, GHWCFG1=0x%08x\n", |
f25c42b8 | 4758 | dwc2_readl(hsotg, GAHBCFG), dwc2_readl(hsotg, GHWCFG1)); |
5b7d70c6 BD |
4759 | |
4760 | dev_info(dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n", | |
f25c42b8 | 4761 | dwc2_readl(hsotg, GRXFSIZ), dwc2_readl(hsotg, GNPTXFSIZ)); |
5b7d70c6 BD |
4762 | |
4763 | /* show periodic fifo settings */ | |
4764 | ||
364f8e93 | 4765 | for (idx = 1; idx < hsotg->num_of_eps; idx++) { |
f25c42b8 | 4766 | val = dwc2_readl(hsotg, DPTXFSIZN(idx)); |
5b7d70c6 | 4767 | dev_info(dev, "DPTx[%d] FSize=%d, StAddr=0x%08x\n", idx, |
47a1685f DN |
4768 | val >> FIFOSIZE_DEPTH_SHIFT, |
4769 | val & FIFOSIZE_STARTADDR_MASK); | |
5b7d70c6 BD |
4770 | } |
4771 | ||
364f8e93 | 4772 | for (idx = 0; idx < hsotg->num_of_eps; idx++) { |
5b7d70c6 BD |
4773 | dev_info(dev, |
4774 | "ep%d-in: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n", idx, | |
f25c42b8 GS |
4775 | dwc2_readl(hsotg, DIEPCTL(idx)), |
4776 | dwc2_readl(hsotg, DIEPTSIZ(idx)), | |
4777 | dwc2_readl(hsotg, DIEPDMA(idx))); | |
5b7d70c6 | 4778 | |
f25c42b8 | 4779 | val = dwc2_readl(hsotg, DOEPCTL(idx)); |
5b7d70c6 BD |
4780 | dev_info(dev, |
4781 | "ep%d-out: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n", | |
f25c42b8 GS |
4782 | idx, dwc2_readl(hsotg, DOEPCTL(idx)), |
4783 | dwc2_readl(hsotg, DOEPTSIZ(idx)), | |
4784 | dwc2_readl(hsotg, DOEPDMA(idx))); | |
5b7d70c6 BD |
4785 | } |
4786 | ||
4787 | dev_info(dev, "DVBUSDIS=0x%08x, DVBUSPULSE=%08x\n", | |
f25c42b8 | 4788 | dwc2_readl(hsotg, DVBUSDIS), dwc2_readl(hsotg, DVBUSPULSE)); |
83a01804 | 4789 | #endif |
5b7d70c6 BD |
4790 | } |
4791 | ||
8b9bc460 | 4792 | /** |
117777b2 | 4793 | * dwc2_gadget_init - init function for gadget |
6fb914d7 GT |
4794 | * @hsotg: Programming view of the DWC_otg controller |
4795 | * | |
8b9bc460 | 4796 | */ |
f3768997 | 4797 | int dwc2_gadget_init(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 4798 | { |
117777b2 | 4799 | struct device *dev = hsotg->dev; |
5b7d70c6 BD |
4800 | int epnum; |
4801 | int ret; | |
43e90349 | 4802 | |
0a176279 GH |
4803 | /* Dump fifo information */ |
4804 | dev_dbg(dev, "NonPeriodic TXFIFO size: %d\n", | |
05ee799f JY |
4805 | hsotg->params.g_np_tx_fifo_size); |
4806 | dev_dbg(dev, "RXFIFO size: %d\n", hsotg->params.g_rx_fifo_size); | |
5b7d70c6 | 4807 | |
d327ab5b | 4808 | hsotg->gadget.max_speed = USB_SPEED_HIGH; |
1f91b4cc | 4809 | hsotg->gadget.ops = &dwc2_hsotg_gadget_ops; |
5b7d70c6 | 4810 | hsotg->gadget.name = dev_name(dev); |
fa389a6d | 4811 | hsotg->remote_wakeup_allowed = 0; |
7455f8b7 JY |
4812 | |
4813 | if (hsotg->params.lpm) | |
4814 | hsotg->gadget.lpm_capable = true; | |
4815 | ||
097ee662 GH |
4816 | if (hsotg->dr_mode == USB_DR_MODE_OTG) |
4817 | hsotg->gadget.is_otg = 1; | |
ec4cc657 MYK |
4818 | else if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) |
4819 | hsotg->op_state = OTG_STATE_B_PERIPHERAL; | |
5b7d70c6 | 4820 | |
1f91b4cc | 4821 | ret = dwc2_hsotg_hw_cfg(hsotg); |
c6f5c050 MYK |
4822 | if (ret) { |
4823 | dev_err(hsotg->dev, "Hardware configuration failed: %d\n", ret); | |
09a75e85 | 4824 | return ret; |
c6f5c050 MYK |
4825 | } |
4826 | ||
3f95001d MYK |
4827 | hsotg->ctrl_buff = devm_kzalloc(hsotg->dev, |
4828 | DWC2_CTRL_BUFF_SIZE, GFP_KERNEL); | |
8bae0f8c | 4829 | if (!hsotg->ctrl_buff) |
09a75e85 | 4830 | return -ENOMEM; |
3f95001d MYK |
4831 | |
4832 | hsotg->ep0_buff = devm_kzalloc(hsotg->dev, | |
4833 | DWC2_CTRL_BUFF_SIZE, GFP_KERNEL); | |
8bae0f8c | 4834 | if (!hsotg->ep0_buff) |
09a75e85 | 4835 | return -ENOMEM; |
3f95001d | 4836 | |
0f6b80c0 VA |
4837 | if (using_desc_dma(hsotg)) { |
4838 | ret = dwc2_gadget_alloc_ctrl_desc_chains(hsotg); | |
4839 | if (ret < 0) | |
4840 | return ret; | |
4841 | } | |
4842 | ||
f3768997 VM |
4843 | ret = devm_request_irq(hsotg->dev, hsotg->irq, dwc2_hsotg_irq, |
4844 | IRQF_SHARED, dev_name(hsotg->dev), hsotg); | |
eb3c56c5 | 4845 | if (ret < 0) { |
db8178c3 | 4846 | dev_err(dev, "cannot claim IRQ for gadget\n"); |
09a75e85 | 4847 | return ret; |
eb3c56c5 MS |
4848 | } |
4849 | ||
b3f489b2 LM |
4850 | /* hsotg->num_of_eps holds number of EPs other than ep0 */ |
4851 | ||
4852 | if (hsotg->num_of_eps == 0) { | |
4853 | dev_err(dev, "wrong number of EPs (zero)\n"); | |
09a75e85 | 4854 | return -EINVAL; |
b3f489b2 LM |
4855 | } |
4856 | ||
b3f489b2 LM |
4857 | /* setup endpoint information */ |
4858 | ||
4859 | INIT_LIST_HEAD(&hsotg->gadget.ep_list); | |
c6f5c050 | 4860 | hsotg->gadget.ep0 = &hsotg->eps_out[0]->ep; |
b3f489b2 LM |
4861 | |
4862 | /* allocate EP0 request */ | |
4863 | ||
1f91b4cc | 4864 | hsotg->ctrl_req = dwc2_hsotg_ep_alloc_request(&hsotg->eps_out[0]->ep, |
b3f489b2 LM |
4865 | GFP_KERNEL); |
4866 | if (!hsotg->ctrl_req) { | |
4867 | dev_err(dev, "failed to allocate ctrl req\n"); | |
09a75e85 | 4868 | return -ENOMEM; |
b3f489b2 | 4869 | } |
5b7d70c6 BD |
4870 | |
4871 | /* initialise the endpoints now the core has been initialised */ | |
c6f5c050 MYK |
4872 | for (epnum = 0; epnum < hsotg->num_of_eps; epnum++) { |
4873 | if (hsotg->eps_in[epnum]) | |
1f91b4cc | 4874 | dwc2_hsotg_initep(hsotg, hsotg->eps_in[epnum], |
9da51974 | 4875 | epnum, 1); |
c6f5c050 | 4876 | if (hsotg->eps_out[epnum]) |
1f91b4cc | 4877 | dwc2_hsotg_initep(hsotg, hsotg->eps_out[epnum], |
9da51974 | 4878 | epnum, 0); |
c6f5c050 | 4879 | } |
5b7d70c6 | 4880 | |
117777b2 | 4881 | ret = usb_add_gadget_udc(dev, &hsotg->gadget); |
9bb073a0 GT |
4882 | if (ret) { |
4883 | dwc2_hsotg_ep_free_request(&hsotg->eps_out[0]->ep, | |
4884 | hsotg->ctrl_req); | |
09a75e85 | 4885 | return ret; |
9bb073a0 | 4886 | } |
1f91b4cc | 4887 | dwc2_hsotg_dump(hsotg); |
5b7d70c6 | 4888 | |
5b7d70c6 | 4889 | return 0; |
5b7d70c6 BD |
4890 | } |
4891 | ||
8b9bc460 | 4892 | /** |
1f91b4cc | 4893 | * dwc2_hsotg_remove - remove function for hsotg driver |
6fb914d7 GT |
4894 | * @hsotg: Programming view of the DWC_otg controller |
4895 | * | |
8b9bc460 | 4896 | */ |
1f91b4cc | 4897 | int dwc2_hsotg_remove(struct dwc2_hsotg *hsotg) |
5b7d70c6 | 4898 | { |
0f91349b | 4899 | usb_del_gadget_udc(&hsotg->gadget); |
9bb073a0 | 4900 | dwc2_hsotg_ep_free_request(&hsotg->eps_out[0]->ep, hsotg->ctrl_req); |
31ee04de | 4901 | |
5b7d70c6 BD |
4902 | return 0; |
4903 | } | |
4904 | ||
1f91b4cc | 4905 | int dwc2_hsotg_suspend(struct dwc2_hsotg *hsotg) |
b83e333a | 4906 | { |
b83e333a | 4907 | unsigned long flags; |
b83e333a | 4908 | |
9e779778 | 4909 | if (hsotg->lx_state != DWC2_L0) |
09a75e85 | 4910 | return 0; |
9e779778 | 4911 | |
dc6e69e6 MS |
4912 | if (hsotg->driver) { |
4913 | int ep; | |
4914 | ||
b83e333a MS |
4915 | dev_info(hsotg->dev, "suspending usb gadget %s\n", |
4916 | hsotg->driver->driver.name); | |
4917 | ||
dc6e69e6 MS |
4918 | spin_lock_irqsave(&hsotg->lock, flags); |
4919 | if (hsotg->enabled) | |
1f91b4cc FB |
4920 | dwc2_hsotg_core_disconnect(hsotg); |
4921 | dwc2_hsotg_disconnect(hsotg); | |
dc6e69e6 MS |
4922 | hsotg->gadget.speed = USB_SPEED_UNKNOWN; |
4923 | spin_unlock_irqrestore(&hsotg->lock, flags); | |
b83e333a | 4924 | |
c6f5c050 MYK |
4925 | for (ep = 0; ep < hsotg->num_of_eps; ep++) { |
4926 | if (hsotg->eps_in[ep]) | |
4fe4f9fe | 4927 | dwc2_hsotg_ep_disable_lock(&hsotg->eps_in[ep]->ep); |
c6f5c050 | 4928 | if (hsotg->eps_out[ep]) |
4fe4f9fe | 4929 | dwc2_hsotg_ep_disable_lock(&hsotg->eps_out[ep]->ep); |
c6f5c050 | 4930 | } |
b83e333a MS |
4931 | } |
4932 | ||
09a75e85 | 4933 | return 0; |
b83e333a MS |
4934 | } |
4935 | ||
1f91b4cc | 4936 | int dwc2_hsotg_resume(struct dwc2_hsotg *hsotg) |
b83e333a | 4937 | { |
b83e333a | 4938 | unsigned long flags; |
b83e333a | 4939 | |
9e779778 | 4940 | if (hsotg->lx_state == DWC2_L2) |
09a75e85 | 4941 | return 0; |
9e779778 | 4942 | |
b83e333a MS |
4943 | if (hsotg->driver) { |
4944 | dev_info(hsotg->dev, "resuming usb gadget %s\n", | |
4945 | hsotg->driver->driver.name); | |
d00b4142 | 4946 | |
dc6e69e6 | 4947 | spin_lock_irqsave(&hsotg->lock, flags); |
1f91b4cc | 4948 | dwc2_hsotg_core_init_disconnected(hsotg, false); |
66e77a24 RK |
4949 | if (hsotg->enabled) { |
4950 | /* Enable ACG feature in device mode,if supported */ | |
4951 | dwc2_enable_acg(hsotg); | |
1f91b4cc | 4952 | dwc2_hsotg_core_connect(hsotg); |
66e77a24 | 4953 | } |
dc6e69e6 MS |
4954 | spin_unlock_irqrestore(&hsotg->lock, flags); |
4955 | } | |
b83e333a | 4956 | |
09a75e85 | 4957 | return 0; |
b83e333a | 4958 | } |
58e52ff6 JY |
4959 | |
4960 | /** | |
4961 | * dwc2_backup_device_registers() - Backup controller device registers. | |
4962 | * When suspending usb bus, registers needs to be backuped | |
4963 | * if controller power is disabled once suspended. | |
4964 | * | |
4965 | * @hsotg: Programming view of the DWC_otg controller | |
4966 | */ | |
4967 | int dwc2_backup_device_registers(struct dwc2_hsotg *hsotg) | |
4968 | { | |
4969 | struct dwc2_dregs_backup *dr; | |
4970 | int i; | |
4971 | ||
4972 | dev_dbg(hsotg->dev, "%s\n", __func__); | |
4973 | ||
4974 | /* Backup dev regs */ | |
4975 | dr = &hsotg->dr_backup; | |
4976 | ||
f25c42b8 GS |
4977 | dr->dcfg = dwc2_readl(hsotg, DCFG); |
4978 | dr->dctl = dwc2_readl(hsotg, DCTL); | |
4979 | dr->daintmsk = dwc2_readl(hsotg, DAINTMSK); | |
4980 | dr->diepmsk = dwc2_readl(hsotg, DIEPMSK); | |
4981 | dr->doepmsk = dwc2_readl(hsotg, DOEPMSK); | |
58e52ff6 JY |
4982 | |
4983 | for (i = 0; i < hsotg->num_of_eps; i++) { | |
4984 | /* Backup IN EPs */ | |
f25c42b8 | 4985 | dr->diepctl[i] = dwc2_readl(hsotg, DIEPCTL(i)); |
58e52ff6 JY |
4986 | |
4987 | /* Ensure DATA PID is correctly configured */ | |
4988 | if (dr->diepctl[i] & DXEPCTL_DPID) | |
4989 | dr->diepctl[i] |= DXEPCTL_SETD1PID; | |
4990 | else | |
4991 | dr->diepctl[i] |= DXEPCTL_SETD0PID; | |
4992 | ||
f25c42b8 GS |
4993 | dr->dieptsiz[i] = dwc2_readl(hsotg, DIEPTSIZ(i)); |
4994 | dr->diepdma[i] = dwc2_readl(hsotg, DIEPDMA(i)); | |
58e52ff6 JY |
4995 | |
4996 | /* Backup OUT EPs */ | |
f25c42b8 | 4997 | dr->doepctl[i] = dwc2_readl(hsotg, DOEPCTL(i)); |
58e52ff6 JY |
4998 | |
4999 | /* Ensure DATA PID is correctly configured */ | |
5000 | if (dr->doepctl[i] & DXEPCTL_DPID) | |
5001 | dr->doepctl[i] |= DXEPCTL_SETD1PID; | |
5002 | else | |
5003 | dr->doepctl[i] |= DXEPCTL_SETD0PID; | |
5004 | ||
f25c42b8 GS |
5005 | dr->doeptsiz[i] = dwc2_readl(hsotg, DOEPTSIZ(i)); |
5006 | dr->doepdma[i] = dwc2_readl(hsotg, DOEPDMA(i)); | |
5007 | dr->dtxfsiz[i] = dwc2_readl(hsotg, DPTXFSIZN(i)); | |
58e52ff6 JY |
5008 | } |
5009 | dr->valid = true; | |
5010 | return 0; | |
5011 | } | |
5012 | ||
5013 | /** | |
5014 | * dwc2_restore_device_registers() - Restore controller device registers. | |
5015 | * When resuming usb bus, device registers needs to be restored | |
5016 | * if controller power were disabled. | |
5017 | * | |
5018 | * @hsotg: Programming view of the DWC_otg controller | |
9a5d2816 VM |
5019 | * @remote_wakeup: Indicates whether resume is initiated by Device or Host. |
5020 | * | |
5021 | * Return: 0 if successful, negative error code otherwise | |
58e52ff6 | 5022 | */ |
9a5d2816 | 5023 | int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg, int remote_wakeup) |
58e52ff6 JY |
5024 | { |
5025 | struct dwc2_dregs_backup *dr; | |
58e52ff6 JY |
5026 | int i; |
5027 | ||
5028 | dev_dbg(hsotg->dev, "%s\n", __func__); | |
5029 | ||
5030 | /* Restore dev regs */ | |
5031 | dr = &hsotg->dr_backup; | |
5032 | if (!dr->valid) { | |
5033 | dev_err(hsotg->dev, "%s: no device registers to restore\n", | |
5034 | __func__); | |
5035 | return -EINVAL; | |
5036 | } | |
5037 | dr->valid = false; | |
5038 | ||
9a5d2816 | 5039 | if (!remote_wakeup) |
f25c42b8 | 5040 | dwc2_writel(hsotg, dr->dctl, DCTL); |
9a5d2816 | 5041 | |
f25c42b8 GS |
5042 | dwc2_writel(hsotg, dr->daintmsk, DAINTMSK); |
5043 | dwc2_writel(hsotg, dr->diepmsk, DIEPMSK); | |
5044 | dwc2_writel(hsotg, dr->doepmsk, DOEPMSK); | |
58e52ff6 JY |
5045 | |
5046 | for (i = 0; i < hsotg->num_of_eps; i++) { | |
5047 | /* Restore IN EPs */ | |
f25c42b8 GS |
5048 | dwc2_writel(hsotg, dr->dieptsiz[i], DIEPTSIZ(i)); |
5049 | dwc2_writel(hsotg, dr->diepdma[i], DIEPDMA(i)); | |
5050 | dwc2_writel(hsotg, dr->doeptsiz[i], DOEPTSIZ(i)); | |
9a5d2816 VM |
5051 | /** WA for enabled EPx's IN in DDMA mode. On entering to |
5052 | * hibernation wrong value read and saved from DIEPDMAx, | |
5053 | * as result BNA interrupt asserted on hibernation exit | |
5054 | * by restoring from saved area. | |
5055 | */ | |
5056 | if (hsotg->params.g_dma_desc && | |
5057 | (dr->diepctl[i] & DXEPCTL_EPENA)) | |
5058 | dr->diepdma[i] = hsotg->eps_in[i]->desc_list_dma; | |
f25c42b8 GS |
5059 | dwc2_writel(hsotg, dr->dtxfsiz[i], DPTXFSIZN(i)); |
5060 | dwc2_writel(hsotg, dr->diepctl[i], DIEPCTL(i)); | |
58e52ff6 | 5061 | /* Restore OUT EPs */ |
f25c42b8 | 5062 | dwc2_writel(hsotg, dr->doeptsiz[i], DOEPTSIZ(i)); |
9a5d2816 VM |
5063 | /* WA for enabled EPx's OUT in DDMA mode. On entering to |
5064 | * hibernation wrong value read and saved from DOEPDMAx, | |
5065 | * as result BNA interrupt asserted on hibernation exit | |
5066 | * by restoring from saved area. | |
5067 | */ | |
5068 | if (hsotg->params.g_dma_desc && | |
5069 | (dr->doepctl[i] & DXEPCTL_EPENA)) | |
5070 | dr->doepdma[i] = hsotg->eps_out[i]->desc_list_dma; | |
f25c42b8 GS |
5071 | dwc2_writel(hsotg, dr->doepdma[i], DOEPDMA(i)); |
5072 | dwc2_writel(hsotg, dr->doepctl[i], DOEPCTL(i)); | |
58e52ff6 JY |
5073 | } |
5074 | ||
58e52ff6 JY |
5075 | return 0; |
5076 | } | |
21b03405 SA |
5077 | |
5078 | /** | |
5079 | * dwc2_gadget_init_lpm - Configure the core to support LPM in device mode | |
5080 | * | |
5081 | * @hsotg: Programming view of DWC_otg controller | |
5082 | * | |
5083 | */ | |
5084 | void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg) | |
5085 | { | |
5086 | u32 val; | |
5087 | ||
5088 | if (!hsotg->params.lpm) | |
5089 | return; | |
5090 | ||
5091 | val = GLPMCFG_LPMCAP | GLPMCFG_APPL1RES; | |
5092 | val |= hsotg->params.hird_threshold_en ? GLPMCFG_HIRD_THRES_EN : 0; | |
5093 | val |= hsotg->params.lpm_clock_gating ? GLPMCFG_ENBLSLPM : 0; | |
5094 | val |= hsotg->params.hird_threshold << GLPMCFG_HIRD_THRES_SHIFT; | |
5095 | val |= hsotg->params.besl ? GLPMCFG_ENBESL : 0; | |
46637565 | 5096 | val |= GLPMCFG_LPM_REJECT_CTRL_CONTROL; |
9aed8c08 | 5097 | val |= GLPMCFG_LPM_ACCEPT_CTRL_ISOC; |
f25c42b8 GS |
5098 | dwc2_writel(hsotg, val, GLPMCFG); |
5099 | dev_dbg(hsotg->dev, "GLPMCFG=0x%08x\n", dwc2_readl(hsotg, GLPMCFG)); | |
4abe4537 GT |
5100 | |
5101 | /* Unmask WKUP_ALERT Interrupt */ | |
5102 | if (hsotg->params.service_interval) | |
5103 | dwc2_set_bit(hsotg, GINTMSK2, GINTMSK2_WKUP_ALERT_INT_MSK); | |
21b03405 | 5104 | } |
c5c403dc | 5105 | |
15d9dbf8 GT |
5106 | /** |
5107 | * dwc2_gadget_program_ref_clk - Program GREFCLK register in device mode | |
5108 | * | |
5109 | * @hsotg: Programming view of DWC_otg controller | |
5110 | * | |
5111 | */ | |
5112 | void dwc2_gadget_program_ref_clk(struct dwc2_hsotg *hsotg) | |
5113 | { | |
5114 | u32 val = 0; | |
5115 | ||
5116 | val |= GREFCLK_REF_CLK_MODE; | |
5117 | val |= hsotg->params.ref_clk_per << GREFCLK_REFCLKPER_SHIFT; | |
5118 | val |= hsotg->params.sof_cnt_wkup_alert << | |
5119 | GREFCLK_SOF_CNT_WKUP_ALERT_SHIFT; | |
5120 | ||
5121 | dwc2_writel(hsotg, val, GREFCLK); | |
5122 | dev_dbg(hsotg->dev, "GREFCLK=0x%08x\n", dwc2_readl(hsotg, GREFCLK)); | |
5123 | } | |
5124 | ||
c5c403dc VM |
5125 | /** |
5126 | * dwc2_gadget_enter_hibernation() - Put controller in Hibernation. | |
5127 | * | |
5128 | * @hsotg: Programming view of the DWC_otg controller | |
5129 | * | |
5130 | * Return non-zero if failed to enter to hibernation. | |
5131 | */ | |
5132 | int dwc2_gadget_enter_hibernation(struct dwc2_hsotg *hsotg) | |
5133 | { | |
5134 | u32 gpwrdn; | |
5135 | int ret = 0; | |
5136 | ||
5137 | /* Change to L2(suspend) state */ | |
5138 | hsotg->lx_state = DWC2_L2; | |
5139 | dev_dbg(hsotg->dev, "Start of hibernation completed\n"); | |
5140 | ret = dwc2_backup_global_registers(hsotg); | |
5141 | if (ret) { | |
5142 | dev_err(hsotg->dev, "%s: failed to backup global registers\n", | |
5143 | __func__); | |
5144 | return ret; | |
5145 | } | |
5146 | ret = dwc2_backup_device_registers(hsotg); | |
5147 | if (ret) { | |
5148 | dev_err(hsotg->dev, "%s: failed to backup device registers\n", | |
5149 | __func__); | |
5150 | return ret; | |
5151 | } | |
5152 | ||
5153 | gpwrdn = GPWRDN_PWRDNRSTN; | |
5154 | gpwrdn |= GPWRDN_PMUACTV; | |
f25c42b8 | 5155 | dwc2_writel(hsotg, gpwrdn, GPWRDN); |
c5c403dc VM |
5156 | udelay(10); |
5157 | ||
5158 | /* Set flag to indicate that we are in hibernation */ | |
5159 | hsotg->hibernated = 1; | |
5160 | ||
5161 | /* Enable interrupts from wake up logic */ | |
f25c42b8 | 5162 | gpwrdn = dwc2_readl(hsotg, GPWRDN); |
c5c403dc | 5163 | gpwrdn |= GPWRDN_PMUINTSEL; |
f25c42b8 | 5164 | dwc2_writel(hsotg, gpwrdn, GPWRDN); |
c5c403dc VM |
5165 | udelay(10); |
5166 | ||
5167 | /* Unmask device mode interrupts in GPWRDN */ | |
f25c42b8 | 5168 | gpwrdn = dwc2_readl(hsotg, GPWRDN); |
c5c403dc VM |
5169 | gpwrdn |= GPWRDN_RST_DET_MSK; |
5170 | gpwrdn |= GPWRDN_LNSTSCHG_MSK; | |
5171 | gpwrdn |= GPWRDN_STS_CHGINT_MSK; | |
f25c42b8 | 5172 | dwc2_writel(hsotg, gpwrdn, GPWRDN); |
c5c403dc VM |
5173 | udelay(10); |
5174 | ||
5175 | /* Enable Power Down Clamp */ | |
f25c42b8 | 5176 | gpwrdn = dwc2_readl(hsotg, GPWRDN); |
c5c403dc | 5177 | gpwrdn |= GPWRDN_PWRDNCLMP; |
f25c42b8 | 5178 | dwc2_writel(hsotg, gpwrdn, GPWRDN); |
c5c403dc VM |
5179 | udelay(10); |
5180 | ||
5181 | /* Switch off VDD */ | |
f25c42b8 | 5182 | gpwrdn = dwc2_readl(hsotg, GPWRDN); |
c5c403dc | 5183 | gpwrdn |= GPWRDN_PWRDNSWTCH; |
f25c42b8 | 5184 | dwc2_writel(hsotg, gpwrdn, GPWRDN); |
c5c403dc VM |
5185 | udelay(10); |
5186 | ||
5187 | /* Save gpwrdn register for further usage if stschng interrupt */ | |
f25c42b8 | 5188 | hsotg->gr_backup.gpwrdn = dwc2_readl(hsotg, GPWRDN); |
c5c403dc VM |
5189 | dev_dbg(hsotg->dev, "Hibernation completed\n"); |
5190 | ||
5191 | return ret; | |
5192 | } | |
5193 | ||
5194 | /** | |
5195 | * dwc2_gadget_exit_hibernation() | |
5196 | * This function is for exiting from Device mode hibernation by host initiated | |
5197 | * resume/reset and device initiated remote-wakeup. | |
5198 | * | |
5199 | * @hsotg: Programming view of the DWC_otg controller | |
5200 | * @rem_wakeup: indicates whether resume is initiated by Device or Host. | |
6fb914d7 | 5201 | * @reset: indicates whether resume is initiated by Reset. |
c5c403dc VM |
5202 | * |
5203 | * Return non-zero if failed to exit from hibernation. | |
5204 | */ | |
5205 | int dwc2_gadget_exit_hibernation(struct dwc2_hsotg *hsotg, | |
5206 | int rem_wakeup, int reset) | |
5207 | { | |
5208 | u32 pcgcctl; | |
5209 | u32 gpwrdn; | |
5210 | u32 dctl; | |
5211 | int ret = 0; | |
5212 | struct dwc2_gregs_backup *gr; | |
5213 | struct dwc2_dregs_backup *dr; | |
5214 | ||
5215 | gr = &hsotg->gr_backup; | |
5216 | dr = &hsotg->dr_backup; | |
5217 | ||
5218 | if (!hsotg->hibernated) { | |
5219 | dev_dbg(hsotg->dev, "Already exited from Hibernation\n"); | |
5220 | return 1; | |
5221 | } | |
5222 | dev_dbg(hsotg->dev, | |
5223 | "%s: called with rem_wakeup = %d reset = %d\n", | |
5224 | __func__, rem_wakeup, reset); | |
5225 | ||
5226 | dwc2_hib_restore_common(hsotg, rem_wakeup, 0); | |
5227 | ||
5228 | if (!reset) { | |
5229 | /* Clear all pending interupts */ | |
f25c42b8 | 5230 | dwc2_writel(hsotg, 0xffffffff, GINTSTS); |
c5c403dc VM |
5231 | } |
5232 | ||
5233 | /* De-assert Restore */ | |
f25c42b8 | 5234 | gpwrdn = dwc2_readl(hsotg, GPWRDN); |
c5c403dc | 5235 | gpwrdn &= ~GPWRDN_RESTORE; |
f25c42b8 | 5236 | dwc2_writel(hsotg, gpwrdn, GPWRDN); |
c5c403dc VM |
5237 | udelay(10); |
5238 | ||
5239 | if (!rem_wakeup) { | |
f25c42b8 | 5240 | pcgcctl = dwc2_readl(hsotg, PCGCTL); |
c5c403dc | 5241 | pcgcctl &= ~PCGCTL_RSTPDWNMODULE; |
f25c42b8 | 5242 | dwc2_writel(hsotg, pcgcctl, PCGCTL); |
c5c403dc VM |
5243 | } |
5244 | ||
5245 | /* Restore GUSBCFG, DCFG and DCTL */ | |
f25c42b8 GS |
5246 | dwc2_writel(hsotg, gr->gusbcfg, GUSBCFG); |
5247 | dwc2_writel(hsotg, dr->dcfg, DCFG); | |
5248 | dwc2_writel(hsotg, dr->dctl, DCTL); | |
c5c403dc VM |
5249 | |
5250 | /* De-assert Wakeup Logic */ | |
f25c42b8 | 5251 | gpwrdn = dwc2_readl(hsotg, GPWRDN); |
c5c403dc | 5252 | gpwrdn &= ~GPWRDN_PMUACTV; |
f25c42b8 | 5253 | dwc2_writel(hsotg, gpwrdn, GPWRDN); |
c5c403dc VM |
5254 | |
5255 | if (rem_wakeup) { | |
5256 | udelay(10); | |
5257 | /* Start Remote Wakeup Signaling */ | |
f25c42b8 | 5258 | dwc2_writel(hsotg, dr->dctl | DCTL_RMTWKUPSIG, DCTL); |
c5c403dc VM |
5259 | } else { |
5260 | udelay(50); | |
5261 | /* Set Device programming done bit */ | |
f25c42b8 | 5262 | dctl = dwc2_readl(hsotg, DCTL); |
c5c403dc | 5263 | dctl |= DCTL_PWRONPRGDONE; |
f25c42b8 | 5264 | dwc2_writel(hsotg, dctl, DCTL); |
c5c403dc VM |
5265 | } |
5266 | /* Wait for interrupts which must be cleared */ | |
5267 | mdelay(2); | |
5268 | /* Clear all pending interupts */ | |
f25c42b8 | 5269 | dwc2_writel(hsotg, 0xffffffff, GINTSTS); |
c5c403dc VM |
5270 | |
5271 | /* Restore global registers */ | |
5272 | ret = dwc2_restore_global_registers(hsotg); | |
5273 | if (ret) { | |
5274 | dev_err(hsotg->dev, "%s: failed to restore registers\n", | |
5275 | __func__); | |
5276 | return ret; | |
5277 | } | |
5278 | ||
5279 | /* Restore device registers */ | |
5280 | ret = dwc2_restore_device_registers(hsotg, rem_wakeup); | |
5281 | if (ret) { | |
5282 | dev_err(hsotg->dev, "%s: failed to restore device registers\n", | |
5283 | __func__); | |
5284 | return ret; | |
5285 | } | |
5286 | ||
5287 | if (rem_wakeup) { | |
5288 | mdelay(10); | |
f25c42b8 | 5289 | dctl = dwc2_readl(hsotg, DCTL); |
c5c403dc | 5290 | dctl &= ~DCTL_RMTWKUPSIG; |
f25c42b8 | 5291 | dwc2_writel(hsotg, dctl, DCTL); |
c5c403dc VM |
5292 | } |
5293 | ||
5294 | hsotg->hibernated = 0; | |
5295 | hsotg->lx_state = DWC2_L0; | |
5296 | dev_dbg(hsotg->dev, "Hibernation recovery completes here\n"); | |
5297 | ||
5298 | return ret; | |
5299 | } |